SelfGOL looks very interesting:

The SelfGOL program can:

• self-replicate by printing its own source code,
• rewrite other Perl programs to allow them to self-replicate their own source code too,
• detect and report the small number of Perl programs that are not rewritable in this way,
• transform itself or other Perl programs into cellular automata of arbitrary size and play Conway's "Game of Life",
• animate any short text as a cycling marquee banner.

SelfGOL accomplishes these feats in under 1000 bytes of standard Perl, without importing any modules, and without using a single if, unless, while, until, for, foreach, goto, next, last, redo, map, or grep.

Has any one been on this course?