I feel as though I have to post about this sooner rather than later. A day or two ago, Kalen of MageUpdate posted an article, Mage Core: Keeping It Clean. The idea of the script is to check your Magento installation for properly coded modules. In theory, this is an absolutely great idea, because I can certainly attest that there is a plethora of garbage modules and extensions out there.
Looking into the script details, it's a simple two-step process: