DVDStyler is a free opensource DVD authoring application for the creation of professional-looking DVDs. It allows not only burning of video files on DVD that can be played practically on any standalone DVD player, but also creation of individually designed DVD menus. DVDStyler actually is a GUI frontend for using dvdauthor and dvd-slideshow scripts to easily build DVD menus and assemble the DVD VOB files.
Dvd2Xvid is free opensource simple easy to use utility to convert DVDs into Xvid video formats. dvd2xvid is a simple GUI for MEncoder aimed at converting DVDs to xvid formats.