ZK: Rich Web Applications Supporting Ruby Scripting
ZK is a popular open source Ajax framework written in Java. It simplifies rich web applications by treating the browser as a simple display server, which reduces the need to have lots of application logic. It's Java, so why it's in RubyInside?
Being Java, ZK's Ruby engine is powered by JRuby, which is already quite mature. With the recent announcement of Microsoft Silverlight technology (which also supports Ruby), this can only mean wider adoption of the Ruby language in many aspects.