I am definitely doing Ludum Dare, and this will be my second one (apart from MiniLD’s)!
Here is what I am using:
Language: Java
IDE: Eclipse
Libraries: LWJGL, Slick2D
Graphics: Paint.NET, Aseprite
Sound: BFXR
Tags: 29, 2D, game, indie, java, Ludum Dare, Slick, sound