VLC media player

• One of the best media players to run all audio and video formats

• VLC - the cross-platform media player and streaming server

  VLC media player is a highly portable multimedia player for various audio and video formats (MPEG-1, MPEG-2, MPEG-4, DivX, mp3, ogg, ...) as well as DVDs, VCDs, and various streaming protocols. It can also be used as a server to stream in unicast or multicast in IPv4 or IPv6 on a high-bandwidth network.

• Good for strange formats like *.3gp that Windows Media Player can't run
• Free open source program
• Homepage: http://www.videolan.org/vlc/ you can download it from its site.