Torrents sites are only of illegal downloads? No… here you can see some distribution sites of legal content.
BitTorrent - From the makers of the original software, they now offer a mixture of free and pay-for content.
bt.etree.org - Band videos of “trade friendly” musicians.
BTSharp - Integrates with .NET apps and helps you distribute with private trackers.
Ibiblo.org - Torrent distribution site of ibiblo content.
Legaltorrents.com - A completely legal torrent site and a great place to experiment and get a feeling for how it works.
LegitTorrents.info - Includes free videos, games and Linux distributions.
LinuxTracker.org - A centralized location for Linux related software, all delivered by torrent.
PublicDomainTorrents.com - Hundreds of torrent media files that reside in the public domain such as movies, TV shows, serials and more. (WARNING:Occasional rotating questionable ad)
Revision3.com - Mixture of torrent-delivered media and direct downloads of vidcasts.
Star Trek:New Voyages - Fan-produced Star Trek episodes, some with original cast members, all distributed with torrents.
SXSW - Free torrents from the organizers of the SXSW music festival.
tlm-project.org - The Linux Mirror Project, helping spread the alternative operating system.
Vuze.com - From the makers of the Azureus client, hosts a mixture of free and pay-for content, all delivered via torrents.

Source

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Do you need a torrent client now? Get one of these:
ABC Client - Runs on Windows 98/ME/NT/2000/XP and Linux.
Acquisition - A torrent client exclusively for Macs.
Arctic Torrent - Runs on Windows 2000/XP/XP 64/2003/2003 64.
Azureus - Runs on all operating systems and supports numerous languages.
BitComet - Runs on Windows 2000/XP/2003/Vista, some support for Windows 98.
BitLord - Works with Windows 98/ME/2000/XP/2003.
BitPump - Runs on all versions of Windows.
BitSpirit - Compatible with Windows 98/Me/2000/XP/2003.
BitTornado - Windows (doesn’t list which versions), Linux, OS X, BSD.
BitTorrent - The original one developed by Bram Cohen. Works with OS X, Linux, and Windows. Is sometimes referred to as “Mainline” to denote its status as the original.
BitTyrant - Works with Linux, OS X, and Windows.
Bits On Wheels - Exclusively for Macs, features 3D images of your peer swarm.
Burst! - Compatible back to Windows 98.
Enhanced cTorrent - For Linux.
FlashGet - Windows-only client program.
FoxTorrent - Torrent client that integrates with the Firefox browser.
Gnome BitTorrent - Another Linux only torrent client.
Halite - Windows NT, 2000, XP
KTorrent - For Linux and OS X.
Opera - Web browsing suite with a built-in torrent client.
qBittorent - For Linux and OS X.
QTorrent - A bittorrent client for Linux.
rTorrent - For Linux and OS X.
sharktorrent - For Linux, OS X, Windows.
Tomato Torrent - Only for the OS X operating system.
Torrent Swapper - For Linux, OS X and Windows - all flavors.
TorrentVolve - For Linux, OS X and Windows (versions not listed).
Transmission - Available for Linux and OS X.
Turbo Torrent - Windows only.
μTorrent - Windows only.

Enjoy and choose the best for you.