Otags generates "tags" files for emacs and vi/vim to give these editors the ability to directly jump to function and value definitions. Otags is based on Camlp4. It can load all Camlp4 syntax extensions and can therefore parse all sources that Camlp4 can parse (including standard and revised syntax).

A free book about the PNG image format.

The original Scheme->C system, the first of its kind. It conforms to the R4RS Scheme standard, and compiles Scheme sources to C as an intermediate step, allowing easy integration with external libraries. Also included is an interpreter, for development, along with some X11 interfaces and an X11-enabled interpreter. Due to a variety of clever techniques, the system is quite fast.