Deluge is a great freeware BitTorrent client. It is open source and has plugins capabilities.

Its interface is simple but effective and is light on system resources. It has versions for Windows, Max OS X and Linux.

Website Download

• Deluge 0.5.9.1
• Windows XP SP3 RTM Download Links
• Shift Linux, a Live-CD Distribution
• Free Download Manager 2.5.758
• Free Download Manager 2.5.755