muParser - A fast math parser library
This project no longer resides at sourceforge. The new home page is: http://muparser.beltoforion.de
force-get Package Manager
Force-get is a package-manager which grabs files from the internet and installs them, much like portage. It supports binary and source packages, and was designed with one simple principle in mind: source and binary packages living in peace together.
ACME Cross-Assembler
ACME is a free cross assembler released under the GNU GPL. It can produce code for the following processors: 6502, 6510 (including illegal opcodes), 65c02 and 65816. ACME supports the standard assembler stuff like global/local/anonymous labels, offset assembly, conditional assembly and looping assembly. It can include other source files as well as binaries while assembling. Calculations can be done in integer or float mode. Oh, and it is fast.