cdname.py names MP3 files and generates M3U playlists from CDDB/freedb INF files. (These are often retrieved with cdda2wav -L). MP3s and playlists can be named using any combination of artist name, track title, album name, track number, etc. Many aspects are configurable via command line options. It should complement most ripping/encoding pipelines well.
Tic-tac-toe is an OpenGL game that focuses on graphical effects, specifically realistic 3D rendering of water. The water surface is procedurally generated, and the pieces float realistically on top of it. The water is textured, blended, and environment mapped. It is fully refracted and incorporates the Fresnel term for opacity.
P4 is a self-organizing, peer-to-peer overlay network similar to Gnutella and Freenet. It differs in that it provides an API for developing applications on top of the network and handles the networking and export functionality for unicast, multicast, user and plugin discovery, and strong encryption and authentication. This frees developers from worrying about networking and allows them to focus on building real functionality.
Ditrit is a programmable application launcher that tries to "do the right thing" for any input. If ditrit is given an email address, it knows to launch your email client and compose an email to that address. Likewise, it knows to open URLs in your browser, text files in your text editor, and AIM screen names in your IM client. Users can easily add new mappings to the configuration file, which consists of template regexps and commands. Ditrit reads its input from stdin or from the X primary selection (the clipboard).