Let's talk about torrent clients.

[LennyLen]

There's also Vuze (aka Azureus), if you want a torrent client that's also a media player, package manager and more. But if you don't want your torrent client doing all that, then stick to uTorrent, as it's the least resource hungry of all the torrnet clients (save the official client, which is just uTorrent reskinned).