Sunwait is a small program for calculating sunrise, sunset, civil twilight, nautical twilight, and astronomical twilight. It has options to wait until some time-offset from one of these events, making it useful for home automation tasks that should happen relative to the sun's position.
Asymptopia Flashcard System uses Motif and LaTeX to produce, manage, and use attractively formatted flashcards. You load some or all of your "collections" and set the timer for pop-up frequency. The GUI interface and "Collection Manager" make creating and modifying flashcards as simple as pushing a single button. A knowledge of LaTeX is only required when entering special symbols.
lin-seti is a command line program allowing the user to mantain a cache of work units for the Seti@Home client. It should run without any problem on Unix-like systems, including Linux. It is designed to be fully compatible with SETI Driver (similar software for Windows), so you can share the same cache on dual boot systems.
discord is a very simple Python module that allows for conversion from normal dates (via 'time.time', 'time.localtime', etc.) to Discordian dates. The module can either be used as a standalone command line application (which prints the current date in Discordian form) or as an extension module.