R – Most intuitive, readable API / language reference documentation

documentationformattinglanguage-agnostic

I'm working on the dreaded last stage of a project: documenting the API for a semi-technical audience.

I'm wondering: what API docs have you found to be particularly elegant?

Note that this has nothing to do with how elegant the API itself is: this is purely a question of the formatting/appearance of the API docs themselves. Which language or API docs convey their information in the most intuitive and readable way?

Best Answer

Python has very compact, but amazingly clear documentation:

http://docs.python.org/index.html