Tovid - A collection of video disc authoring tools to create DVDs, VCDs, and SVCDs for playback on a home DVD player. - http://tovid.wikia.com/
libdvdnav - A library for developers that allows use of DVD menus. - http://dvd.sourceforge.net/
Ganim8 - A full suite of tools for building and manipulating animated GIFs and small videos. - http://www.phrozensmoke.com/projects/ganim8/
EffecTV - A real-time video effector to watch TV or video through different effectors. - http://effectv.sourceforge.net/
Gmerlin - A multimedia architecture that consists of a set of multimedia libraries, a multiformat media player, a transcoder, an alsamixer, and a webcam application. - http://gmerlin.sourceforge.net/
'Q' DVD-Author - A GUI frontend for dvdauthor written in Qt for creating DVD menus. - http://qdvdauthor.sourceforge.net/
OGMRip - An application and a set of libraries for ripping and encoding DVD into AVI, OGM MP4 or Matroska files using a wide variety of codecs. - http://ogmrip.sourceforge.net/