cloc counts blank lines, comment lines, and physical lines of source code in many programming languages.

Rip web accessible (distributed) version control systems: SVN/GIT/HG...

Generate random nonsense math papers

A nice collection of day-to-day Perl scripts.

Perl (XS) module implementing prime number utilities, including sieves

Highly experimental personal projects.

A self hosting Extended brainfuck to pure brainfuck compiler