You can view some of my current work on GitHub, but here are selection of things I've worked on in the past:

Semantic Web Ontologies at the University of Kent (pdf)
» Final-year university research project on the Semantic Web.
Nationwide Statement Converter
» An open-source application written in Ruby to convert bank statements for use with iBank.
C# Alphanum Algorithm implementation
» Implementation of David Koelle’s Alphanum algorithm in C#.