Finding any free software for Audio, Video,DVD conversion is very tough but the DVDVideoSoft.com provides you all the tools free of cost.
Also you can download the whole bundle which includes almost 23 tools called the Free Studio.
With this free software you can convert video and audio files between different formats and to iPod, PSP, iPhone, BlackBerry and other portable devices; burn and rip DVDs and audio CDs; upload and download videos and music to your computer, iPod, PSP, iPhone and BlackBerry; perform basic editing of audio and video files.
You can download the the standalone tools and also the pack
The Tools included in the Free Studio Pack :
You may also be interested in another free video converter tool.