In addition to small side projects, I've worked on and built several larger projects:

Glowstone Glowstone, a lightweight, from scratch, open source Minecraft server software written in Java that supports plugins written for the popular Bukkit API.
PermissionsBukkit PermissionsBukkit, a once-popular permissions configuration/management plugin for Bukkit Minecraft servers. It is designed to be lightweight and performant while remaining full-featured.
Unpickled Unpickled, a browsable database of every world, level, and extra file in Hamumu's hit game Supreme With Cheese (which I have also helped update and maintain for newer systems).
McURL McURL, or the Minecraft URL Launcher, a small tool that handles the minecraft:// URL protocol and allows connecting to servers from links found on server websites or public server lists. It is compact and easy to install.

More of my work can also be found on the following sites:

GitHub GitHub, where I have made occasional contributions to open-source projects including Rust libraries and the Bukkit project. I also have several old personal projects there.
Ludum Dare Ludum Dare, a rapid game development competition in which participants have 48 hours to make a game from scratch, which I used to participate in fairly frequently.
Wombat Wombat, my personal repository of various small-scale specific interest projects, largely Hamumu and Minecraft stuff and other assorted fun.