Google's Engineering Practices documentation
Literate Programming can be Quick and Dirty
Unix system man page on the web
Dynamically generated stats for your github readmes
Amazon Web Services — a practical guide
transfer xml into specific text-formats (html, dot, source-code, ...)
xslet project provides some XSL libraries and applets.
Doxygen filter for Google Protocol Buffers files
WSGI Server, WSGI Connector, Python doc generator
A GUI frontend to Apache FOP
proof verifier for mathematical proofs and documentation generator
Code documentor for multiple langauges