OpenShiiva is a simple yet powerful vob to mp4 converter, featuring an all YUV pipeline, and with high quality in mind. Converts video -and- audio at the same time.
mConverter is a GUI for converting video files using open source tools such as mplayer, mpeg2enc, and ffmpeg.
MediaPipe is a flexible framework to manipulate medias. It allows building customized decoding/filtering/encoding pipelines. This project contains the MediaPipe SDK along with some sample pipes.
iPodRaze is a free Open Source project utilizing the Cocoa Framework written for Mac OS X in C++, Objective-C and Applescript. iPodRaze lets uses take their own music from their iPods and copy them back to their hard drives. Free your music!