Flask[1] for Python or maybe Play 2.0 Framework[2] with Scala. For Google Go, Revel[3] is probably the most widely used web framework for Go. If you want someth

Flask[1] for Python or maybe Play 2.0 Framework[2] with Scala. For Google Go, Revel[3] is probably the most widely used web framework for Go. If you want something in Ruby, perhaps Sinatra[4]. If you're just looking to expand your knowledge and use them on your own, I don't think you can go wrong with any of them. If you're looking to expand your skills for employers, Python with Flask or Django (or alternatively node.js) probably have the most (current) adoption for companies out of your list if you're interested in using whichever language on the web. [1] http://en.wikipedia.org/wiki/Flask_(programming) http://en.wikipedia.org/wiki/Flask_(programming) [2] http://en.wikipedia.org/wiki/Play_Framework http://en.wikipedia.org/wiki/Play_Framework [3] http://robfig.github.io/revel&#x2F http://robfig.github.io/revel/ [4] http://en.wikipedia.org/wiki/Sinatra_(software) http://en.wikipedia.org/wiki/Sinatra_(software)