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What is BitComet (A powerful C++ BitTorrent Client)?

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.
• [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.