Real Alternative will allow you to play RealMedia files without having to install RealPlayer.

Free DVD Ripper is a very useful tool, which allows you to rip DVD movies, convert DVD VOB-files to one VCD, SVCD, DivX, MPEG1, MPEG 2, MPEG4, AVI file.

With this free audio editor, you can not only record and play sounds, but also import and export WAV, AIFF, MP3, and OGG files.

Nexus Radio is a free full featured radio player for listeners who want to record their favorite radio content for playback on their PC, or any portable device that supports MP3s.

YouTube Downloader is a software program that allows you to download videos from YouTube and many others and convert them to other video formats.

Super © is a free and yet very efficient tool, designed to let you easily convert or play all types of multimedia files, practically all the existing audio and video formats.

If you can't play a video file with a non-common codec on your usual media player, VLC Media Player may solve your problem.