LiVES is a simple to use yet powerful video effects, editing, conversion, and playback system aimed at the digital video artist and VJ. It runs under Linux, BSD, Mac OS X/Darwin, IRIX, and openMosix. It is frame and sample accurate, can handle almost all types of video, and is fully extendable through plugins and the included plugin builder tool. It can also be controlled remotely using OSC.
SubTimer is an easy-to-use subtitle editor based on SubStation Alpha, an abandoned freeware project for Windows. It features simple editing (cut, copy, paste, line split and merge, insert, and delete), time shifting for shifting a range of subtitles by a specified amount of time, timing based on an audio file (the audio wave is displayed on the screen, and the user can pick the start and end times by clicking on it), and UniCode support. It supports Substation Alpha (srt), SubRip (ssa), and plain text subtitle formats.