Probably the most advanced of my projects is a Mud base (currently evoling into a DragonBall Z mud). Currently I have used pthreads and BSD sockets (the software itself runs on Linux) and has a different room structure to most of the muds I have played. The area's are actually grids with different heights associated with them (as in real life you can actually fly up and have a view of the surrounding area - this isn't properly implemented in it yet). This allows for better combat programs as you can back away for a breather as you see in a number of fights, this can be what other muds have as flee but I'd have something where you are still in a combat mode and then would have to flee to get out of there.
Another Program I am working on is a Java clone of MSN messenger. The reason why I am creating this is that I spend most of my time on Linux which (understandably) I haven't been able to find one (admittedly I haven't looked that hard) and most of my friends use it. This is not really in a useable state.
I also am working on a Java Mud Client. This currently a clone of telnet but I am trying to get it so that, instead of scrolling what you have typed, it retypes it back to the bottom line. I am having a number of troubles getting it to do this.
A project that I am yet to start is basically a backup/monitorng program where instead of a person manually having to back up his/her work, it would automatically scan through the directories you have told it to, and would back these items up to somewhere else in your hard drive (this will extend to over a network in future). A few more features would include a version control system where it would make multiple backups over time, and, using a diff type program, this would allow progress to be seen. I would probably start doing this project in Java with C++ versions later on.
I have also worked on the Cutting Edge website where along with Paul Aspen and Joe Dew.