The following is a list of some of my projects which I feel may be helpful to somebody. They are all released under the GPL so feel free to modify and alter as you please. Just let me know if you've got any interesting feedback on any of these.

/klogger - Linux-based user space keylogger.

/c-ray-tracer - My first attempt at a ray tracer, written in C

/lambda-lua - Functional programming in Lua (map, filter and reduce)

/ooo2pdf - Utility which uses OpenOffice.org to convert any document format accepted by OpenOffice.org to PDF format

/odsreader - Python module for parsing an OpenOffice spreadsheet

/rot - A UNIX utility for ROT 13 and ROT 47 encoding of text. Written in Haskell

/bargraph - Dynamic JavaScript bar graphs