BitComet 2.01

Support preview of video file which is being downloaded.
Support DHT Network, download trackerless torrent!
Completely new core written in C++, stable and fast, very low CPU usage. (detail)
Ability to limit the upload speed as well as download speed. (detail)
Clean and free, without any adware or spyware. ( Please note: Spybot may misreport "Comet Cursor" )
Multiple simultaneous downloads, ability to select download files in one torrent and set file priority.)
Intelligent Connection Optimize, Auto Optimization for different connections, runs well using all default settings.
Intelligent Rate Control, optimize the upload distribution in order to get the max download rate.
Intelligent Disk Cache, decrease the potential damage to the hard disk when high-speed downloading (>500KB/s) by decrease the read / write frequency, extra memory usage is the cost. (detail)
Intelligent Disk Allocating, no long-time disk allocation, also decrease the disk fragment to almost zero.
Intelligent Hash Scan, no time-consuming scanning when seeding / resume. (detail)
Firewall and NAT Traversal, users behind differect NAT can now connect to each other (detail)
Auto config ICF (Internet Connection Firewall) and ICS (Internet Connection Sharing) in Windows XP
Auto config port mapping in router (UPnP support is required in router, Windows XP is required). (detail)
Ability to block IP temporarily or permanently, compatiable with eMule ipfilter.dat.
Ability to chat with other downloaders ( disabled by default )
Compatiable with Windows XP SP2 TCP/IP restriction (detail)
ZIP package is also provided, which runs withoust installation.
Using only one TCP listening port. (detail)
Support Multi-tracker, and utf-8 extension, UDP tracker Protocol v2.
[Please Note]: It is reported that Zone Alarm 5.0 conflict with BitComet (and other p2p maybe). (discussion here)
Support automatically power off with conditions.

_http://download.bitco...omet_setup.exe
3.04mb
Free

http://download.bitco..._setup.exe(3.5 MB)

http://download.bitco...109_plugin.exe ~ 2,2 MB

v1.15 2009.09.25
GUI Improved: task information panel lists change to task information tabs, support drag & drop and context menu
GUI Improved: redesign "Task Summary" tab
GUI Improved: task "Recommend" page changes to "Start Page" tab
GUI Improved: hide unnecessary task tabs when no task selected or task stopped
GUI Improved: add "Network Setting Wizard" to "Network" page in Option dialog
GUI Improved: improve context menu of status bar, add "port mapping again" and "help"
GUI Improved: add download/upload limit setting to context menu of floating window and system tray icon
GUI Improved: show "ED2K link" in file list of BT task
GUI Improved: highlight the current time block in scheduler setting page
GUI Bugfix: password not cleared when change user name in CometPassport sign in dialog
GUI Bugfix: pieces status and upload speed of emule plugin display incorrectly in peer list
Core Improve: emule plugin upgraded to v0.49c
Core Improve: improve connection algorithm of Long-Time seed for high-speed network
Core Improve: "Start all seeding" from context menu of floating window do not start tasks with file missing
Core Improve: improve DNS query
Core Improve: update task finish time when BT task download finished again after selecting more files to download
Core Bugfix: EVENT_COMPLETE should be sent to tracker only when all files in BT task downloaded, not only selected (v1.13 and v1.14)
Core Bugfix: connection number too small after some files in BT task finished
Core Bugfix: UPNP modular can not exit normally sometimes
Core Bugfix: task should enter in queue if when started during stopped time of schedule
Core Bugfix: remove port mapping of eMule plugin when program exiting

v1.14 2009.07.31
GUI Improved: support Web Seed when make torrent file
GUI Improved: support modify Web Seed list in BT task properties dialog
GUI Improved: display download/upload rate of user group in peer list of BT task
GUI Improved: display downloading piece position in peer list of BT task
GUI Improved: display balloon on system tray icon when disk busy leading to GUI losing response
GUI Improved: new appearance option: minimize when program start
GUI Improved: add loading page to bookmark in left fav bar
GUI Improved: loading torrent collection list from xml file in working thread, avoid GUI freezing
GUI Improved: decrease the delay switching to torrent collection list from task list
GUI Improved: add new command in context menu of floating window: start uploading all
GUI Improved: change the BitComet icon in system tray to grey when program exiting
GUI Improved: new setting in connection panel of option dialog: Alternate max upload rate when not downloading
GUI Improved: statistics panel displays current download rate limit and upload rate limit
GUI Improved: individual max concurrent downloading task numbers for BT tasks and HTTP tasks in option dialog
GUI Improved: new "Force" option for BT task protocol encryption in option dialog
GUI Improved: new setting in Long-Time Seeding panel of option dialog: Auto upload rate control
GUI Improved: statistics panel displays current upload rate limit of long-time seeding
GUI Improved: BitComet not responding dialog will be closed automatically after GUI resumed
GUI Bugfix: can't add HTTP Tracker whose port is 80 in BT task properties dialog
GUI Bugfix: if task selection state changed before task delete dialog displayed, the task will be deleted may not be the originally selected
Core Improve: BT task supports downloading from Web Seed, compatible with BitTorrent mainline
Core Improve: decrease CPU usage of DHT modular
Core Improve: ban the peers from the specified IP even they changed peer ID
Core Improve: improve connection algorithm for UDP download from Long-Time seed
Core Improve: send no-retry instruction to remote UDP peers when exiting
Core Improve: improve connection algorithm for BT uploading
Core Improve: give BT upload connection higher priority when auto upload rate control of long-time seeding enabled
Core Bugfix: max simultaneous half-open TCP connection number in advanced option page does not take effect
Core Bugfix: making torrent file may fail if there're too many files in the specified folder

GUI Improved: add Summary tab to Torrent History and Torrent Share list
GUI Improved: open Torrent from URL dialog supports multiple URLs
GUI Improved: export all torrents in one time by selecting multiple tasks in task list, Torrent History or Torrent Share list
GUI Improved: display "click to add" in file list when BitTorrent task missing ED2K links
GUI Improved: add Snapshot and Comment tab to Torrent History and Torrent Share list
GUI Improved: new command in context menu of Torrent History: "add to task list"
GUI Improved: support import unfinished download files with any extension name
GUI Improved: new advanced option: allow preview program to open files of any type from file list (thanks to greywizard)
GUI Improved: enhance video file capture ability of Firefox extension
GUI Change: CometPassport renamed to CometID
GUI Bugfix: percent of score bar for CometID level up displays invalid for level 50+ (v1.22)
GUI Bugfix: after modifying save path in task properties dialog and selecting moving files, the downloaded files are copied to new folder, not moved
GUI Bugfix: no beeps after download completed (v1.22)
GUI Bugfix: after changing torrent file encoding in task properties dialog, the task name in Torrent History is not refreshed
GUI Bugfix: cannot send crash report under XP
GUI Bugfix: after switched to Torrent History, some buttons in toolbar should disabled
Core Improve: supports HTTP 301/302 redirecting for Web Seed
Core Improve: eMule plugin Xtreme Mod upgraded to v8.0 (eMule v0.50a)
Core Improve: after error code received from Tracker, increase retry interval and re-connect later
Core Improve: increase priority of HTTP tracker connection
Core Improve: improve piece request algorithm for BitTorrent task, reduce CPU usage
Core Bugfix: if BitTorrent task containing multiple files, multiple eMule plugin will be launched incorrectly(v0.50a)
Core Bugfix: failed to generate Crash Report in Vista/Win7 (v1.22)
Core Bugfix: upload task number limit works incorrectly when there are any task whose torrent not downloaded yet
Core Bugfix: perform hash-check if file changed or missing when start BitTorrent task
Core Bugfix: FTP download did not handle the error of disconnect by server unexpectedly
Core Bugfix: FTP download failed to resume download from certain FTP servers
Core Bugfix: fix DNS query function

_http://download.bitco...omet_setup.exe

http://download.bitco...1.24_setup.exe

GUI Improved: improve text information displayed in VIP acceleration dialog
GUI Improved: improve progress bar of disk space in task properties dialog
GUI Improved: new setting in advanced option page to enable/disable auto hash check after downloaded file changed
GUI Improved: new setting in advanced option page to enable/disable disk boost service (only Vista and later)
GUI Improved: display the status of disk boost service in statistical tab (only Vista and later)
GUI Improved: tasks in queue will be displayed in Active task list
GUI Improved: improve re-connection timers displayed in tracker list
GUI Improved: do not display torrent downloading prompt dialog when open a magnet link
GUI Improved: improve GUI font when choosing Traditional Chinese in non-Traditional Chinese Windows
GUI Improved: simplify torrent status icon in torrent history and torrent share list
GUI Improved: do not fix the width of date column in torrent history and torrent share list
GUI Improved: improve display refreshing code of torrent history and torrent share list, reduce CPU usage
GUI Improved: display the default command in context menu of torrent history and torrent share list as bold
GUI Improved: new command in context menu of Torrent Collect list: Add to Torrent Share
GUI Improved: add openbittorrent and publicbt as default trackers when creating torrents
GUI Improved: green light appears after incoming connection established from a remote peer
GUI Improved: add large icon of 256*256 for Vista/Win7
GUI Improved: add new column to Torrent History list: private torrent
GUI Improved: do not lock the width of preview column in task list
GUI Improved: display total download time in task summary tab
GUI Improved: display the number of days in case of downloading left time is more than 24 hours
GUI Improved: check downloaded files at program startup, and display warning icon on task if file missing. It can be disabled in advanced option page.
GUI Changed: Long-Time Seeding renamed to Long-Term Seeding
GUI Bugfix: the downloaded size in task statistical dialog when selecting multiple tasks is invalid
GUI Bugfix: when mouse cursor hovering on system tray icon in XP, the task running info balloon can not be shown
GUI Bugfix: the delete button in toolbar grayed out when pressing Ctrl to select multiple items in Torrent History and Torrent Share
GUI Bugfix: in the global option dialog, the max value of cache size for each connection of HTTP download should be 2MB
GUI Bugfix: after torrent downloaded for Magnet URI, the hidden options in advanced page of task properties dialog is not shown right away
GUI Bugfix: the error message of failure to listen on UDP port is not accurate
Core Improve: using disk boost service to create large files when start downloading, to speed up disk operation, avoid UI no response (only Vista and later)
Core Improve: improve kernel to reduce CPU usage for UI refreshing when downloading BitTorrent task
Core Improve: connect to one only tracker at a time when downloading private torrent, and clear all peers when switching tracker
Core Improve: improve crash report program
Core Improve: improve transport interval of peer exchange
Core Improve: use worker thread to process socket message, thereby reduce message handling in UI thread
Core Bugfix: do not connect to tracker when remove a tracker from tracker list (thanks to kluelos)
Core Bugfix: when listening port disabled in option dialog, program will dead-loop when exit

_http://download.bitco...omet_setup.exe

v1.27 2011.04.22
GUI Improved: display Batch Download window when drag&drop multiple torrent files to main window or floating window
GUI Improved: remove the drop-down menu from the delete button in toolbar of Torrent History or Torrent Share list
GUI Improved: add "Show Detailed Info" option in View menu
GUI Improved: new setting in option dialog: add to Torrent Share when opening torrent
GUI Improved: display translation text of "Day" and "Hour" in task left time
GUI Improved: display recovered and dropped data size by hash-checking in task log list
GUI Improved: display used memory size in Statistics pane
GUI Improved: new setting in Advanced Option page: max number of UDP packets sent per second
GUI Improved: display upload/download speed in the left of main window's title bar
GUI Improved: display more accurate error info when opening Magnet URI of unsupported types
GUI Improved: display preview window of task downloading progress when mouse hovers on floating window or system tray icon
GUI Improved: display Batch Download window when open multiple torrent files from File menu
GUI Improved: display confirm window if tasks need hash-check when started
GUI Improved: add new global option: display hash-check confirm window
GUI Improved: enhance video file capture ability of Firefox extension
GUI Improved: max cache size in global options page up to 16 GB under 64-bit system
GUI Improved: display download/upload size of this session in Statistics pane
GUI Improved: drop-down menu of remove button in toolbar is removed. click remove button with shift key can remove download task and files together
GUI Improved: decrease the context menu level of floating window and system tray icon
GUI Improved: available space can be displayed correctly even if the save folder is a symbol link to other volume
GUI Improved: improve the crash report program
GUI Improved: new task list of VIP Downloads
GUI Improved: "delete task and files" removed from task context menu. click "delete task" menu command with shift key to delete download task and files together.
GUI Improved: support context menu of IE 9 to download using BitComet
GUI Improved: modify the size of BT task properties dialog, compatible with 1024x600 resolution
GUI Improved: display navigation pane of Windows Explorer when open task download folder under Windows XP
GUI Improved: the text of task status in summary pane can't be displayed completely when it's too long
GUI Improved: new button in toolbar: add Magnet URI
GUI Improved: BitComet video download extension for Firefox supports Firefox 4
GUI Improved: BitComet plugin for Firefox supports Firefox 4
GUI Improved: un-installation program will notify running BitComet to exit
GUI Changed: update check for popular software removed totally
GUI Changed: remove the "Don't show again" option in task remove confirm window
GUI Bugfix: "Open Forum" button in toolbar become invalid when file list is showing
GUI Bugfix: after remote connection established, the network status light turns green, but the tooltip of the light and the listening port status in Statistics pane not refreshed
GUI Bugfix: in v1.26, certain settings in Proxy page can't be saved
GUI Bugfix: in v1.26, unable to create new tag from Task Tag option page
GUI Bugfix: in v1.26, the seed number not displayed in task summary pane
GUI Bugfix: the option "add to Torrent Share when opening torrent" doesn't work
GUI Bugfix: when mouse hovers on the system tray icon, the preview window of task downloading progress displayed in incorrect position
GUI Bugfix: the detail info windows of download/upload size in task summary pane couldn't be able to shown up after program running for a long time
GUI Bugfix: the task state icon displayed as warning if only download part of files of a BitTorrent and choose "Download Later"
GUI Bugfix: after increase text size of Windows (DPI setting), the layouts of certain windows went wrong
GUI Bugfix: the function of shutdown computer after all task download finished ignores tasks in queue
Core Improve: native support for 64-bit system
Core Improve: read file in working thread after disk cache of BitComet used up, to avoid UI responding slowly while high-speed seeding
Core Improve: slow down download speed when disk writing speed can not catch up, to avoid UI responding slowly while high-speed downloading
Core Improve: improve uploading queue handing, to boost uploading speed in LAN
Core Improve: if the the download drive not accessible when task starts, hash-check will be skipped to avoid download progress be reset
Core Bugfix: stop and restart BT task containing 0 size files will lead to unnecessary hash-checking
Core Bugfix: drop incoming peers whose listening port is unknown when their connection disconnected
Core Bugfix: files not closed after task stopped as disk space full, making those files locked for moving or removing
Core Bugfix: if only select part of files in a BitTorrent download, the task progress may fall back after hash-checking
Core Bugfix: when the setting of allocate space before downloading enabled, only the space of the first 50 files is allocated
Core Bugfix: if the save folder is a junction of directory, the download will fail
Core Bugfix: download rate limit for single BT task not applied to downloading from Long-Term Seeds

_http://download.bitco...omet_setup.exe

v1.28 2011.06.28
GUI Improved: move VIP Acceleration window into BitTorrent task properties dialog
GUI Improved: new option in VIP Acceleration tab of BitTorrent task properties dialog: Anonymous Download
GUI Improved: add Anonymous Download state to VIP icon in task list
GUI Improved: bookmark list in left favorites bar recovered
GUI Improved: remember the position and size of task properties dialog
GUI Improved: add Folder and Private columns in task list, hidden by default
GUI Improved: display a balloon tip when accessing network share folder leads to UI no response
GUI Improved: 32/64 bit editions use separate install packages
GUI Improved: auto update identify 32/64 bit editions correctly
GUI Improved: the language list uses the language names provided by Windows
GUI Improved: add icons to the main menu and context menu of floating window
GUI Improved: display a balloon tip when launch a new instance of BitComet while another is exiting
GUI Improved: the default action of minimize button of main window changed to minimize to task bar under Win 7
GUI Improved: remove the AutoRefresh option in Torrent Collection toolbar. new torrents are appended to the bottom directly
GUI Improved: when the display number of Torrent Collection list reaches max value, a info bar will be displayed
GUI Improved: add Remove command to Torrent Collection list
GUI Improved: decrease start-up delay of Torrent Collection by loading torrents information asynchronously
GUI Improved: display a balloon tip when sorting the list of Torrent Collection leads to UI no response
GUI Improved: add a icon for "Properties" in the context menu of task list
GUI Improved: improve the thumbnail task list for system tray icon and floating window when mouse hovering
GUI Improved: add "reset to default layout" the context menu of detailed tabs of Torrent Share and Torrent History
GUI Improved: the option of "show detailed info" in View menu works for Torrent Share and Torrent History
GUI Improved: display free memory of BitComet process in Statistics pane
GUI Bugfix: disable task operation buttons in toolbar when display VIP download list
GUI Bugfix: the setting of show toolbar and show status bar in View menu not remembered
GUI Bugfix: failed to read cookie from Firefox 4 when add HTTP download
GUI Bugfix: support saving files larger than 4G in volume of HFS+/HFSJ/HFSX
GUI Bugfix: v1.27 failed to start under Win2000
GUI Bugfix: the text of weekday in Schedule setting page misplace in certain display setting condition
GUI Bugfix: batch adding torrents have Chinese file name will fail under English Windows XP
Core Improve: support Anonymous Download for tasks enabled VIP Acceleration, preventing any direct connection to trackers or BitTorrent peers
Core Improve: update BitTorrent client identification code
Core Bugfix: memory access violation leading to program crash

_http://download.bitco..._x86_setup.exe

_http://download.bitco..._x64_setup.exe

_http://download.bitco...Comet_1.28.zip

v1.29 2011.09.23
GUI Improved: display prompt message when UI no response while writing piece_part file
GUI Improved: new option in advance page of BitTorrent task properties dialog: Bypass task seeding rules, keeps active
GUI Improved: change the health value of task displayed on the right of availability graph in task summary to the availability value
GUI Improved: display the download size/rate from VIP Acceleration in the tooltip of task summary
GUI Improved: after click the prompt balloon of task finish, the corresponding task will be highlighted in the list
GUI Bugfix: task list failed to sort by download/upload size
GUI Bugfix: tracker setting not saved after remove a tracker from the context menu of tracker list
Core Improve: Web seeding supports HTTP servers which do not accept range request
Core Improve: improve connection request algorithm, decrease unnecessary connection number
Core Improve: disable eMule plugin for Anonymous Download
Core Improve: support Firefox 6
Core Bugfix: BitTorrent download containing too many files can not launch VIP Acceleration
Core Bugfix: failed to auto-shutdown after all download finished if any queued seeding task exists

_http://download.bitco..._x86_setup.exe

_http://download.bitco..._x64_setup.exe

_http://download.bitco...Comet_1.29.zip

v1.30 2011.11.11
GUI Improved: cleaned up and improved a lot of code, reduce program size
GUI Improved: add VIP download list button in task list toolbar
GUI Improved: do not allow hide the title column of task list
GUI Improved: new command in View menu: Find Task (Ctrl+F)
GUI Improved: switch file list to Simple List or Tree List, from context menu
GUI Improved: display the tree list of files correctly when the files in Torrent are not sorted by directories
Core Improve: support Firefox 7
Core Improve: the file size limit of Torrent changed to 10MB
Core Improve: support torrents whose piece size is not the integral multiple of 16 KB

_http://download.bitco..._x86_setup.exe

_http://download.bitco..._x64_setup.exe

_http://download.bitco...Comet_1.30.zip

v1.31 2011.12.12
GUI Improved: save the heights of task list pane and Torrent History pane separately
GUI Improved: keep the tasks which occur downloading error together when sort task list by state
GUI Improved: add confirm dialog when restore the display of hidden torrents in Peer Share list
GUI Bugfix: Auto-Shutdown at specified time does not work
GUI Bugfix: open URL using system default browser instead of IE
GUI Bugfix: torrent file icon should not use the program icon
GUI Bugfix: when adding new Torrent, all files will be downloaded instead of only selected
GUI Bugfix: task position in the task list should not be changed when press Home/End
GUI Bugfix: the setting of View - Task list - Show filter does not work when program starts
Core Bugfix: handle torrent file not using UTF-8 encoding

_http://download.bitco..._x86_setup.exe

_http://download.bitco..._x64_setup.exe

_http://download.bitco...Comet_1.31.zip

* GUI Improved: improve the snapshot icon display in task list
* GUI Improved: when resize the main window, keep the width of left fav bar unchanged
* GUI Improved: when load a URL list file to do a batch download, show a message if duplicated URLs detected
* GUI Bugfix: after sort task list, the sort state will not be restored when program restart
* GUI Bugfix: when download a Magnet URI, the default save folder is not filled in the new task dialog
* GUI Bugfix: when multiple URL links are selected in IE9 web page, they cannot be drag&drop to the floating window
* GUI Bugfix: the sort state of task list will be broken when modify the task filter
* GUI Bugfix: if the multiple-monitor configuration of Windows changed during program running, some dialog will be displayed in invalid position
* GUI Bugfix: when multiple tasks are selected, the refresh of task number in status bar will flicker
* GUI Bugfix: fix the program icon of 256x256
* Core Improve: support Firefox 10
* Core Bugfix: program may crash if failed to load detail file of any task

_http://download.bitco..._x86_setup.exe

_http://download.bitco..._x64_setup.exe

_http://download.bitco...Comet_1.32.zip

GUI Improved: add download speed/progress graph in task summary pane
GUI Improved: add download size in total, upload size in total, torrent create time in task list, hidden by default
GUI Improved: display new finished tasks in bold
GUI Improved: display proxy server connection errors in task log
GUI Improved: after hash checking, mark the banned and removed files in piece map as empty
GUI Improved: improve the operation of open file, open folder and invoke anti-virus software, avoid UI not response
GUI Improved: add new language: Kurdish
GUI Bugfix: fix the bug of missing file extension name when start download by Magnet URI
GUI Bugfix: fix the bug of not keeping selection state when switch between task list and torrent exchange list
GUI Bugfix: install package supports Windows 8.1
Core Improve: improve Firefox extension to support multiple Firefox versions
Core Bugfix: fix the bug in Firefox extension that unable to start BitComet from Save As dialog
Core Bugfix: fix the bug of the save folder of HTTP/FTP file is not set to the desired one from remote download webpage

v1.39 2015.06.29
* GUI Bugfix: fix the expired code signing certificate
v1.38 2015.03.30
* GUI Improved: add open-folder button in download finish pop-up window
* GUI Improved: display download speed and progress together when floating window re-sized large enough
* GUI Improved: change the option of auto-stop seeding time from minutes to day-hour-minute
* GUI Bugfix: fix the floating window display problem when using multiple monitors
* Core Improve: improve file read/write performance, reduce UI stuck
* Core Improve: support ReFS disk volume
* Core Improve: support Chrome browser extension
* Core Bugfix: the minimize value of network.max_connecting_connections in advanced options changed to 8
* Core Bugfix: fix bugs in IE extension

_http://download.bitco..._x86_setup.exe

_http://download.bitco..._x64_setup.exe

_http://download.bitco...Comet_1.39.zip

v1.42 - 2016.07.04
GUI Improved: improve support for high-DPI monitor

v1.41 - 2016.05.24
GUI Improved: display Batch Download window when open multiple torrent files in File Explorer
GUI Improved: merge 32bit/64bit editions into one install package
Core Improve: increase default disk cache limit from 50 MB to half of total momory, up to 1GB
Core Improve: add peer software version recognization

v1.40 - 2015.09.06
GUI Improved: support Windows 10
GUI Bugfix: Torrent make dialog not displayed when drag-n-drop files to the web-view pane in main window
Core Bugfix: when delete download task and its files together, sometimes certain sub-directories are not removed

_http://download.bitco..._x86_setup.exe

_http://download.bitco..._x64_setup.exe

_http://download.bitco...Comet_1.39.zip

_ http://download.bitco...omet_setup.exe

_ http://download.bitco...omet_setup.exe