Downloading OpenArena and add-ons using BitTorrent (a distributed peer-to-peer filesharing technology) and then seeding for other downloaders is a great way to help the OpenArena community. It reduces the demand for the normal mirrors and helps ensure that everyone can get OpenArena at the best possible speeds.
Full Version (linux, windows, mac)
Help out your fellow OpenArena players and SEED!
Warning: there is a very important note for MAC OSX users about 0.8.8 "unified" package, otherwise the game will not start: please read Manual/Install#About OA 0.8.8 on Mac.