Redcar is an apps that written in Ruby and run on JRuby, it is a useful text editor. It’s currently in active development and it’s getting quite mature.
With Redcar, everything is a plugin and every new plugin will written in Ruby where it is very easy to use by an user. At the moment, Redcar is still not in development product and still under alpha version where you may just install it through the RubyGems.
gem install redcar redcar install
Try it today by browse to the Redcar site.