Hal­ite (named after the min­eral) is a C++ Bit­Tor­rent cli­ent based on the excel­lent lib­t­or­rent lib­rary from Ras­ter­bar Soft­ware. The pro­gram also relies heav­ily on the Boost lib­rar­ies.

It is light and simple and already portable.

You can find more information on there website http://www.binarynotions.com/halite-bittorrent-client/ OR on the http://sourceforge.net/projects/halite/