BipIO - https://github.com/bipio-server/bipio is all JavaScript, the biggest thing it needs right now is a migration of the configuration dashboard at https://bip.io into the public repo.

Currently a Backbone/LESS/PHP(Zend) stack and needs some CSS consolidation, a decouple from PHP, (most of this is already done), a Gruntjs build system, security audit and general cleanup and also an Apps/plugin framework

oh and there's also Templar (http://mjpearson.github.io/templar/) which could be a whole lot more awesome :D