This is a great initiative: http://pinouts.ru/
I have an old computer power supply lying around which I want to repurpose for a DIY electronics project. But which pin is what? I can try my volt meter on every pin, but using this site is much easier!
This site contains a database with more than 1400 descriptions of hardware pinouts, cables, connectors and even some schemes. Everything is nicely categorized and searchable. You can even submit your own pinouts if you think something is missing!
