annoyme is a program that plays a sound effect every time you hit a key on your keyboard to give you the feeling you are using a real typewriter. This can be used to impress colleagues with your typing skills or just for sentimental reasons. It supports various sound input methods, as well as multiple output libraries like ALSA or AO. Most importantly, it is also possible to add more sound themes. Currently, only input for XEvIE (on an X Server) is supported.
Bitfighter is a game that feels a little like Asteroids on steroids. It's a multiplayer space-based combat and strategy game, featuring customized ships, multiple game modes, cool retro graphics, and smooth network play. It also includes a full featured level editor, Lua scriptable bots, and other cool features. It has a very active development team, so the game keeps improving.
gigacount is a smartphone app that simulates radiation measurement. The camera takes pictures of objects. It stores the pictures as files or transmits them to a service on the network. A user sees the preview of the camera and a number that represents the (estimated) value of radiation. She can set up the application to display random numbers and which format/unit. It also includes options to alter preview color or display a static meter background.
WaddaFundraiser! is a collection of Android wallpaper apps for fundraisers. When fundraisers sell "stuff", 50% or more of the donations they collect go to 3rd party companies. WaddaFundraiser! provides free software for fundraisers to customize with their own logos and colors and then sell or give away as rewards for donations. The fundraiser gets to keep all of the funds raised. The first offering is a fireworks-themed Android live wallpaper, with Patriotic Android and Patriotic Cat examples.