Video Converter is a free tool that lets you convert any type of video format.

The most comprehensive multi format video converter available and is very easy to use. Supports: FLV, AVI, 3GP, MPEG, MOV, MKV, WMV, SWF, and audio formats such as MP3, WAVE, OGG, WMA, AU.
 
License: Freeware Free
Requirements: No special requirements
Supported OS: Windows XP/Vista/7

What you can do?