- MRTG: grapher for network traffic
- AutoTrace: converts bitmapped to vector graphics
- GNOME Human Interface Guidelines
- Crosstool: scripts for building cross-compilers
- Suspend 2: Software suspend for Linux
- SVGSlice: Inkscape plugin for slicing SVG into bitmaps
- hex coordinates
- Bash for unit testing
- LaTeX
- Unit symbol fonts
- Enstrom's Almond Toffee
- ColorBrewer, for coloring data sets
- Random numbers
- PBEM stuff