Hi! I'm a general programmer/CS student who likes to use Geany for everything textual. I got around to installing the Unity 5 Editor a few days ago but was disappointed to find that its scripting workflow mainly went through MonoDevelop, so I switched that to Geany in the preferences.
Unfortunately, this meant I lost all of the built-in autocomplete and hinting features, so I spent a few hours constructing building a .tags file for the Unity 5 Scripting API for Geany. You can find it here:
https://github.com/DThought/unity-tags