FOSS software which implements a mailing list, not just over email but as a sharable, clonable git repo. Implements nntp, online html archives, and atom feeds. Written in perl. Designed to run on the lower possible common denominator machine. Uses a pull model, which optimizes for casual readers and members while still allowing for serious users.
Kareha doesn't use a database, Wakaba does.
Just what it says on the tin. Implements Z-code with cheat commands so you can play Infocom games on whatever system you have Perl installed on. Supports multiple front-end interfaces.