Platemail is a cross-platform email client written in Java, featuring built-in, configurable spam detection and filtering capabilities, a variety of user interfaces and the option of storing mail in a relational database. Click here to see more.
BatCaveAmp is a skin for Winamp or XMMS, based on the colour scheme of this site.
I wrote a very basic Sudoku Solver one afternoon, and now it's here for all to see.
Details of my other projects will appear here soon.