mairix is a program for indexing and searching email messages stored in Maildir, MH or mbox folders
Parser & analyser for Lojban
tdl is a lightweight command-line program for managing a 'to-do' list of pending tasks.
spill is a program for creating set of symbolic links from one directory hierarchy which point to corresponding filenames in a separate directory hierarchy.
Solver, analyzer and generator for a wide variety of sudoku puzzles
A command-line tool for uploading a directory tree over FTP and keeping a local cache of what is at the remote end.