FatRat is an open source download manager for Linux written in C++ and built on top of the Trolltech Qt 4 library. It is rich in features and is continuously extended.
Features of the Git version:
HTTP(S)/FTP/SFTP downloads
FTP/SFTP uploads
RSS feed support + special functions for TV shows and podcasts
BitTorrent support (including torrent creating, DHT, UPnP, encryption etc.)
Torrent search
Support for SOCKS5 and HTTP proxies
RapidShare.com FREE downloads
RapidShare.com uploads
RapidShare.com link verification and folder extraction