HGL is a compiler/interpreter suite for developing images. It features its own simple but powerful language, an output format configurable by plugins, runtime input handled by plugins, and easy integration into various environments like Web servers or graphical applications. The input is taken from a source file, which has to be compiled for quick and frequent access by the interpreter. An interpreter then runs the compiled files, takes input from custom plugins (if neccessary), and outputs its result via custom plugins.
Animmerger stitches 2D images together into either a static image or an animation, while attempting to preserve a global frame of reference (static background). That is, for a movie that follows an actor around (and the background scrolls to follow them), it creates a movie that has a fixed background, and the camera moves around in the scene. The most obvious application of animmerger is in automatic map stitching for 2D video games, but there are many general purposes for which the program can be used. Its color quantization and dithering algorithm set is particularly advanced.