MathJax is a modular javascript framework for including mathematics in web pages. It can take input in various formats, like TeX and MathML, and can produce output in various forms, such as MathML or HTML-with-CSS. Components are loaded as needed.
LogiLogi is a system to share and discuss ideas in an integrated and cumulative way. Openness and quality are it's core aims. We also develop other web2.0 / social software FOSS projects...