Bitcomet is a p2p file-sharing freeware fully compatible with BitTorrent, designed for the high-speed distribution of 100MB or GB sized files.

BitComet is a easy-to-use multitorrent client for Win32 platforms, along with lots of improvements.

Support download certain files within torrent, disk cache, fast resume, port mapping, speed limits, etc. Small, clean, and fast.
No adware or spyware.