UPDATE: A !! new version !! of this guide is avalaible. UPDATE: This guide was for gedit 2.18.x, please upgrade to gedit 2.20.x to have an easier color scheme managing. Textmate is really a great text-editor (almost an IDE but faster), it has even the support for latest Ruby/Rails technologies like RSpec. On the GNU/Linux side there are also similar full-featured text editor and one is Gedit. Gedi