RubyCreator is an effort to add Ruby language support to QtCreator IDE and aim to have most of the features you can find on QtCreator C++ support.
Believe me, the plugin is much better than the logo!
Far more than just syntax highlighting!
You need to compile it by yourself, check the instructions at https://github.com/hugopl/RubyCreator.
Have an easier way to install and test it is the next goal.
You can find me on IRC, hugopl at freenode or send a email to hugo.pl@gmail.com.