Shutter Encoder - Open source software without any restriction - converter all formats video|audio|image professionnals codecs and standards - swiss knife tool Windows, OSX and Linux
HandBrake - HandBrake allows users to easily convert video files into a wide variety of different formats.
Wondershare UniConverter - Wondershare UniConverter (originally Wondershare Video Converter Ultimate) can convert any video to over 1000 formats at 30X faster speed without quality loss, burn DVD, compress/edit/download/record videos, transfer files to devices.
Format Factory - Format Factory is software that allows the user to convert media into various file formats. The software is a product of PC Free Time, a Chinese software development company. Read more about Format Factory.
FFmpeg - Open source multimedia suite for conversion, playback, profiling, and streaming.
File Converter - Convert & compress everything in 2 clicks!