I am planning to use my work-in-progress library and tools for in-browser HTML5/SVG games and either bfxr or WebAudio for sounds. The library is at https://github.com/julienq/zap and the code for my entry will live at https://github.com/julienq/zap/tree/master/ld24

Unless the theme is really terrible, that is. I intend to make an entry in HTML5, and use anything from my personal Github repo; mostly my JS toolbox at https://github.com/julienq/flexo.