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 v1.20

• GUI Improved: new command in file menu: "Import Unfinished Download", supports BitComet, uTorrent, Xunlei
• GUI Improved: start download from torrent infohash directly in "Open torrent from URL" dialog
• GUI Improved: drag & drop task names to rearrange task list(when task list not sorted)
• GUI Improved: BT task summary tab: show BT task pieces number; show down/upload speed/size detail info in tooltip when mouse hovers on them
• GUI Improved: BT task peer list: new command "Friend Upload Slot" in the context menu, for only one IP at the same time
• GUI Improved: BT task tracker list: show seeds, peers, downloaded number returned from tracker
• GUI Improved: BT task file list: sort file names in the same order as Windows Explorer(thanks to RadioNoise)
• GUI Improved: display snapshots tab in new BT task dialog when open torrent file
• GUI Improved: modify the size of BT task properties dialog, compatible with 1024x600 resolution
• GUI Improved: for finished BT task, "search for Long-Time Seeds" displayed as "enable Long-Time Seeding", "search for eMule sources" as "enable upload to eMule sources" in task properties dialog
• GUI Improved: new global option: maximum number of concurrent seeding BitTorrent tasks
• GUI Improved: new global option: Don't use proxy for tracker/peer connections
• GUI Improved: new global option: specify separated listen port for Web UI
• GUI Improved: supports Occitan language(see lang\HowTo-Translate.txt)
• GUI Improved: when using remote desktop, disable highlight the row on which mouse hovers in file list, peer list and tracker list
• GUI Improved: improve compatibility of install package with Vista/Win7
• GUI Bugfix: tailing space in tracker address leads to connection failure
• GUI Bugfix: can't start BitTorrent download when drag&drop a Magnet URI text to floating window
• Core Improve: use UTF-8 encoding when making torrent file by default for all language versions of Windows
• Core Improve: improve algorithm, reduce CPU usage of DHT modular, avoid GUI blocked
• Core Improve: improve algorithm, reduce CPU usage of Long-Time Seeds download modular, avoid GUI blocked
• Core Improve: support HTTPS tracker
• Core Bugfix: after Scheduler stopped all tasks, the option of "Auto start task when download rate less than specified rate" will still start tasks
• Core Bugfix: after BT task stopped, corresponding DHT connections didn't stop totally
• Core Bugfix: invalid DHT packet may lead to program crash(thanks to Pierre Noguès)
• Core Bugfix: task list backup file from v1.19 can't be imported by itself