Java
Balloon Breaker
Just a small Applet implementation of the PPC solitaire game Balloon Breaker - for something so simple it's remarkably addictive.
OrbisDiem
OrbisDiem is a highly configurable desktop application (and is a work in progress) that shows a composite satellite image of the Earth's surface showing where is it night and day. It is also possible to add up to six clocks to the bottom of the display and have them display different timezones.
Sudoku Solver
The obligatory Sudoku solver
Graphical IP Address Lookup
A small program that uses Geoscope's IP address information to plot the location of an IP address on a Google Map.
Whois lookup
Perform whois lookups on IP addresses or hostnames.
John Conway's Game of Life
An Applet implementation of John Conway's Game of Life, it contains many preloaded patterns including Gosper's Glider Gun.
Linux, Unix and Shell Scripting Hints and Tips
The list below contains some things I have learned and worked out in my *mumble* years of Unix sys admin. I exclusively use the Korn shell, I would have probably moved to Bash a long time ago had it supported functions via the ksh FPATH method, but it doesn't (or certainly didn't, I haven't checked for years) so I never made the move.