- gasbag produces ctags and etags from Haskell code.
- Generate a simple PDF calendar.
- dir_tree_walk is a PHP function for recursively processing directory trees.
- A pure-PHP implementation of the Mersenne Twister.
- A convenient way to use large numbers, with arbitrary precision, in PHP.
- Currying in PHP.
- A rapid, visual way to select colours for a website.
I wrote these when teaching myself jQuery. They're probably not worth your time unless I've actually asked you to look at them.