Cocoa Bittorrent client and C torrent library - based on fork of libbt, with high performance and compatibility, advanced prioritisation and scheduling, DHT, and Protocol Encryption.
BlastServ is a plugin used with XChat and Mac OS X. It will be an IRC File Server (FServ or FServe), similar to SysReset for Windows or Obsidian. Fservs send files over DCC, and have an interface like FTP. They are a quick and easy way to transfer files.