Ace

Improved function and method hooking.
– Enhanced event handling with the ability to create custom events.
– In-game addon disabling and enabling.
– Easy saving of settings per character and per class.
– Debug features with optional module.
– Built-in myAddons support.

New features for 1.2! (Requires World of Warcraft client version 1.7+)

– On-demand loading of addons. (Addons must support this specifically.)
– New enable and disable features. (Require UI reload or game restart.)
– Script hooking capabilities.