Shows a lot of potential. I certainly want to encourage the author. He specifies it as a beta so the rating is based on that. I didn't quite get what it was at first so I downloaded it and tried it out. It seems to let you create a certain type of mod at this stage. That's a DLC type mode, i.e. add/modify civs, leaders, buildings, units, etc. It doesn't seem to be so much for UI mods though it's seems a framework that could handle it.
Thought the author claims not to be a developer he developed an application all the same. Calling it a GUI is a bit of an understatement. I thought menues, statusbars, toolbars, etc. It's actually an entity relationship diagram editor purpose built for Civ mods. The discussion thread shows the interface.
Overall an outstanding start.