Befunge is an esoteric programming language designed by Chris Pressey. In the past few years, the Befunge community has completely died out. The language itself, however, remains fun.
Here is a small program that I wrote several years ago. Of course, it requires a Befunge interpreter to run.
Here is the SourceForge page for the Funge family of languages. It's a dead project, so there's nothing to see there.