A bunch of lua utility libraries made for fun. Here's the rundown:

• fmt.lua: utilities for formatting and printing stuff. The huge thing here is being able to print table structures, even indented, as well a format() function that works very similar to python.
• oop.lua: implementation of a simple OOP system for lua.
• util.lua: general utilities, check inside for details.
• math.lua: miscellaneous mathematical utilities.

Unless otherwise noted, all these libraries are on the public domain.