"ULMUL" is an original Ultra Lightweight MarkUp Language. ULMUL texts can be converted into HTML5 with "ulmul2html5" command and into XHTML with "ulmul2xhtml" command. TeX style equations are converted into MathML. ULMUL is written in Ruby. You can also use ulmul.rb as a library. Visit its project homepage http://ulmul.rubyforge.org/ . Use ulmul-slidy.js and ulmul-slidy.css in the ulmul package for your presentations using Firefox.