Docco
Literate Programming can be Quick and Dirty
...The idea is to read code like a book — commentary on one side, code on the other — which helps reviewers and learners understand intent and implementation simultaneously. It supports many languages (via configuration) and is intentionally quick and dirty, prioritizing lightweight output rather than heavy tooling. For teams that favour documentation that stays close to the codebase (rather than entirely separate docs), Docco offers a pragmatic route to keep documentation aligned with implementation. Because the output is browser-readable, it can live in your repository or website and be regenerated easily. ...