SiSU Project - sisudoc.org: document generator - markup, publishing in multiple formats & search
https://git.sisudoc.org/code/sisu
License: GPLv3+
git clone git://git.sisudoc.org/code/sisu
for sisu markup samples see: https://git.sisudoc.org/projects/sisu-markup

(in ruby http://www.ruby-lang.org )
(work has been done on a version of sisu written in D :-)
https://git.sisudoc.org/code/sisudoc-spine