Sinthgunt is an open source graphical user interface for ffmpeg, a computer program that can convert digital audio and video into numerous formats. Using pre-configured conversion settings, it makes the task of converting between different media formates very easy
MediaFork is a GPL’d, multiplatform, multithreaded DVD to MPEG-4 ripper/converter, available for Mac OS X, Linux, and Windows. It is based on the source code to HandBrake