We did a post back in 2007 covering more than 50 torrenting tools with legitimate uses. Here's an updated list with another 50+ resources.
Have a torrenting site that you'd recommend? Tell us about it in the comments.
Distribution Sites (With Legal Content)
isoHunt - A comprehensive BitTorrent search engine that's updated hourly.
Torrent Reactor - A catalog of torrents from a variety of web sites.
TorrentScan - A torrent search engine that includes a variety of sites and up-to-date file sharing news.
The Slackware Linux Project - A torrent source for Slackware Linux.
bitoogle - A basic BitTorrent search engine.
BTbot - A BitTorrent search engine that also includes forums.
TorrentPortal - A BitTorrent tracker with more than a million registered members.
Yotoshi - A torrent search engine that also features torrent-related news.
PeerIt - A marketplace where you can buy and sell torrents.
TuxDistro.com - Linux-related torrent site.
YouTorrent - A huge legal torrent search engine with more than 300,000 files.
Information Sites
Orb's Torrent Site Status - Check the status of tons of torrent sites to see if they're on or offline.
TorrentFreak.com - Up-to-date news on the torrent community of both the legal and illegal variety. Occasionally offers legal downloads. They also have a good tutorial on how to start a torrent of your own using some of the most popular clients.
Torrent Clients
TorrentSpy - A BitTorrent client that shows the current real-time number of complete and incomplete users on a torrent.
Anatomic P2P - A modified BitTorrent client that uses various PHP based supertrackers and a decentralized network implementation.
aria2 - A download manager that supports HTTP(S), FTP, BitTorrent, and Metalink protocols.
Bitflu - A free BitTorrent client written in Perl and run as a daemon on Linux and possibly OSX.
BitLet.org - A torrent client that runs right in your browser.
BitThief - A free-riding BitTorrent client that is currently serving as the basis of a scientific experiment and requires measurements of performance.
BTG - A C++ BitTorrent client.
Free Download Manager - A free and open-source download manager that supports HTTP, FTP, and BitTorrent protocols.
G3 Torrent - A free python BitTorrent client.
LimeWire - An open source P2P client.
Miro - A free and open source BitTorrent client for online video that includes tools to publish your videos.
MLDonkey - A P2P client that supports a variety of networks for Linux, Unix, and Windows operating systems.
Shareaza 2.4.0.0 - A free P2P client with multi-network support.
Rufus - A BitTorrent client based on g3torrent.
SymTorrent - The only BitTorrent client for Symbian OS.
Torium - A minimalist torrent client for linux.
TorrentFlux - A torrent file transfer system for Linux, Unix, and BSD.
Unworkable - A free, BSD-licensed BitTorrent client that places efficiency and simplicity among its top priorities.
Tribler - A P2P network that focuses on keyword searches, category browsing and seeing what similar users are downloading.
libTorrent - A C++ BitTorrent library for Unix and Linux.
MonoTorrent - An open source BitTorrent library originally developed as part of Google's Summer of Code 2006.
Torrent Station 1.1 - A Mac OS BitTorrent client with features like individual limits and folders.
Kyaya Torrent Manager - A simple and open source BitTorrent client.
Torrent Searcher X - A Mac OS X BitTorrent client that searches five major trackers.
TorrentDam.app - A torrent search engine that searches on seven different sites.
iTorrentFlux - A Mac OS X TorrentFlux tool.
Eetee 1.0 - An inexpensive torrent client for Max OS X.
XTorrent - Another Mac OS X torrent client.
Torrent Harvester 0.7b - A torrent search app.
VIP Torrent - An e-mule style torrent client that searches hundreds of P2P networks at once.
Torrent Finder - A torrent search engine with browser plugins for both Firefox and IE.
Torrent Loader - A TorrentSpy-like program that provides both the main data about a torrent and the hierarchic structure.
Torrent Torque - A Delphi-coded torrent client.
Extended BitTorrent - A high-performance BitTorrent client.
Hydranode - A plugin-driven P2P client framework with a graphical UI and multi-tracker support.
MooPolice - BitTorrent client that includes the ability to create torrent files, auto save paths and an editable tracker list.
Browser Plugins
torrenTools - A browser toolbar for Firefox and Internet Explorer that allows you to search 41 torrent search sites at once.
Seedpeer - Autocompleting search plugin for Firefox and Internet Explorer.
TorrentBar - A search extension for Firefox.
More torrenting resources from Mashable: