Server-side js
http://en.wikipedia.org/wiki/Comparison_of_server-side_JavaScript_solutions
Node.js/V8 ("Node") is all the rage at the moment:-
http://yui.zenfs.com/theater/crockford-loopage.m4v
http://debuggable.com/posts/understanding-node-js:4bd98440-45e4-4a9a-8ef7-0f7ecbdd56cb
http://nodebeginner.org/
https://github.com/joyent/node/wiki/Installation
http://anders.janmyr.com/2011/05/not-very-short-introduction-to-nodejs.html