Dateutils are a bunch of tools that revolve around fiddling with dates and times in the command line, with a strong focus on use cases that arise when dealing with large amounts of financial data. Their target market is shell scripts that need date calculations or calendar conversions, and as such they are highly pipe-able and modeled after their well-known cousins (e.g. dtest vs. test, or dgrep vs. grep).
deheader analyzes C and C++ files to determine which header inclusions can be removed while still allowing them to compile. This may result in substantial improvements in compilation time, especially on large C++ projects. It also sometimes exposes dependencies and cohesions of which developers were unaware.
doclifter helps with lifting documents with nroff markup to XML-DocBook. Lifting documents from presentation level to semantic level is hard, and a really good job requires human polishing. This tool aims to do everything that can be mechanized, and to preserve any troff-level information that might have structural implications in XML comments. TBL tables are translated into DocBook table markup, PIC into SVG, and EQN into MathML (relying on pic2svg and GNU eqn for the last two).
euclid-wm is a minimalist tiling window manager for X11. It is designed to allow quick and easy management of numerous windows entirely from easy-to-learn, Vim-like key-bindings. It seeks to do two things in particular: balance the ease of use common among automatic-layout tiling window managers with the flexibility of manual layout window managers, and create a useful way to handle minimized applications.
Galaxis is a curses-based clone of Christian Franz's game Galaxis for the Macintosh. It is a logic puzzle--you must drop probes in space to locate four lifeboats from a distressed interstellar liner. Can you locate them all before you run out of probes and they run out of oxygen?