High Quality Content by WIKIPEDIA articles! Application Enhancer (APE) is a software program released by Unsanity for Apple`s Mac OS X operating system. Application Enhancer provides a framework that allows third-party developers to write "haxies" for OS X. It also provides a daemon to load haxies when certain applications are launched. These haxies, or plugins, are known as application enhancer modules, or APEs. Once the APE is loaded by the daemon, the module modifies the behavior of an existing application. Examples include allowing the classic Mac OS WindowShade behavior, or adding/removing OS X`s brushed aluminum theme to all applications.