Markdown by DaringFireball - Text-to-HTML conversion tool/syntax for web writers, by John Gruber
Doxygen - Generate documentation from source code
txt2tags - It reads a text file with minimal markup such as **bold** and //italic// and converts it to the...
DocFX - A documentation generation tool for API reference and Markdown files!
Texy! - Texy! is a lightweight markup language as well as converter of this format to XHTML, in a form of a...
NDoc - NDoc generates class library documentation from .