The AbiWord word processor is a full-featured cross-platform word processor.
The Open Descent Foundation (ODF) is a community for developers, who want to help to create open source programs, tools, etc. for the famous games Descent1, -2 or -3. Everyone can join the ODF if he accepts the idea of writing open source programs.
A modular audio programming language, designed to write applications quickly. Its main goal is real time audio processing, but it should be used for any kind of development.
Exegraph is a visual, object-oriented, dataflow-driven programming language environment for the Windows and Macintosh platforms.
Fraktron is a set of specifications, libraries and applications to facilitate historically correct typesetting of German and other languages in blackletter script using a variety of font formats, encodings, modes and features.
Pysox is an open-source library for the development of isometric, 3D games (RTS and TBS chiefly). It will be scriptable in either Python or Lua. It is written in Objective-C using GNUstep, OpenGL, and SDL.
The Gnuritas project aims at designing a "smart" and flexible framework and tools to manage and share knowledge, information and scientific data.
isectd is a middleware daemon that provides many-to-many client-to-server connectivity. Supports multiplexing requests to multiple server processes over IP networks.