mkdvd is a script which can convert AVI, DivX, MPEG, and other video file to DVD VOB files and optionally burn them onto a DVD+/-R(W). It can put multiple videos on one disc, and is also able to create a simple menu to select between the different videos.
Subconv converts divx subtitles from one format to another (from srt/tmplayer/mdvd/sub2 to tmplayer/srt). It can also adjust subtitles delay and split subtitles.