A very simple program to test Ruby regular expression ala http://www.rubular.com/, just locally and offline.
Just place it in a directory of your choice and run rhegexp.rb.
$ ./rhegexp.rb
Modify directly the glade source file at lib/ directory, the ruby-glade-create-template-generated rb in that same directory, and re-generate and run using the rake task.
Of course you need to have installed ruby-gnome2 gem and all the associated gems, and of-course^2^, you need to have installed ruby and ruby-gems.
You can find a good description of how to install Ruby-GNOME2 0.18.1 in Ubuntu 9.04 Jaunty Jackalope in my blog at Rha7dotCom Blog