BitComet is a p2p file-sharing freeware fully compatible with Bittorrent, which is one of the most popular p2p protocol designed for high-speed distribution of 100MB or GB sized files. BitComet is a powerful, clean, fast, and easy-to-use bittorrent client. It supports simultaneous downloads, download queue, selected downloads in torrent package, fast-resume, chatting, disk cache, speed limits, port mapping, proxy, ip-filter, etc

Features:

• 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.
• Support automatically power off with conditions.

New in v1.13

• GUI Improved: add "Uploading" queue to the left fav bar
• GUI Improved: BT task file list in properties dialog and right-bottom pane changes to tree list for directory structure
• GUI Improved: BT task file list in properties dialog and right-bottom pane support sorting
• GUI Improved: add new commands to context menu of BT task file list: expand/collapse folders
• GUI Improved: add check box to BT task file list pane for each file and folder, to switch download it or not
• GUI Improved: add connection status icon for each peer in BT task peer list
• GUI Improved: add "new peer" command to context menu of BT task peer list
• GUI Improved: BT task peer list displays prompt string when frozen by ScrollLock
• GUI Improved: support only export selected tasks into backup file
• GUI Improved: support import tasks from backup file and merge them into task list
• GUI Improved: select whether import global program settings while import tasks from backup file
• GUI Improved: language list in Tools menu changes to a 2-level sub menu
• GUI Improved: add loading page to task content, Snapshot, Comment and Recommend pane
• GUI Improved: do not clear rate graph in floating window when stop all tasks
• GUI Improved: do not show the message of missing BitCometAgent.dll when program start
• GUI Improved: optimize reconnect time after Comet Passport sign in failed
• GUI Improved: add support for several new languages (see lang\HowTo-Translate.txt)
• GUI Bugfix: when open a GB2312 encoding torrent file in traditional Chinese Windows, the task name and publish info displays incorrectly after change character encoding
• GUI Bugfix: TCP, UDP mode setting of Long-Time seeding in advanced options can not be saved
• GUI Bugfix: restore the torrent archive list which removed in v1.12
• GUI Bugfix: if select none of files in BT task to download, the task progress will display incorrectly when program start next time
• Core Improve: improve taskname.piece_part.bc! file structure, which used to save file boundary data for BT task, therefore decreased memory usage
• Core Improve: BT task Anti-Leech setting changes to three levels: "disable", ""auto", "strict"
• Core Improve: improve network modular code, avoid program losing response when download in high speed
• Core Improve: add disk cache for UDP Long-Time seeding, 50MB max
• Core Improve: set the thread priority of UDP Long-Time seeding below normal
• Core Bugfix: memory leak in UDP uploading modular of Long-Time seeding
• Core Bugfix: too many memory and CPU used when Long-Time seeding in high speed using UDP