Docutils is a system for processing plaintext documentation into useful formats, such as HTML, XML, and TeX. It supports multiple types of input, such as standalone files (implemented), inline documentation from Python modules and packages (under development), PEPs (Python Enhancement Proposals) (implemented), and others as discovered.
For an overview of the Docutils project implementation, see PEP 258, "Docutils Design Specification".
Docutils is implemented in Python.