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.

Changelog:

v0.66 2006.4.27

Core Improved: more program run-time error can be detected by the crash report
Core Bugfix: fix the bug that the sometimes program will crash when display chat message

Get it here.