ShelveDB is a pure python SQL-like database engine, where queries are preformed in analogous python syntax. It uses only built-in modules and shelve as the data structure. It has regular expression searching, plus native python typing and type checking.
Humans vs. Zombies is a game of moderated tag. A group of human players attempts to survive a zombie outbreak by not being tagged by zombie players. See humansvszombies.com for more. The HVZ program is a Django application that administrates this game.