.wwf toolkit is a set of shell scripts to convert PDF files to .wwf files and vice versa. The resulting .wwf files are virtually indistinguishable from files created with the official WWF drivers. The PDF files the toolkit creates are fully unprotected and can be printed or manipulated by other PDF utilities.
DarGUI is a graphical frontend for the Disk ARchiving utility (DAR) that aims to make it easier and quicker to perform common backup tasks using DAR. It uses the GTK+ library, which is installed on most Linux distributions, so usually the only additional dependency is DAR. DarGUI aims to complement and enhance the command line features of DAR rather than conceal them, and to help users to learn how DAR works so that they can use it from the command line when necessary. It is written in Pascal using FreePascal and the Lazarus IDE.
Five Hundred is a card game for four players similar to Euchre or Bridge, especially popular in Australia and New Zealand. The wikipedia page has a comprehensive description of gameplay. This version is implemented in C++/Qt. It incorporates graphics from the svg-cards project. Computer players are scriptable in Lua.
Giada is a minimal, hardcore audio tool for DJs and live performers. Just pick your sample, drop it in any channel, and start the show by using this tiny piece of software as a loop machine, drum machine, sequencer, live sampler, or effect (VST) host. Giada aims to be a compact and portable virtual device for production use and live sets.