Mono
Since I want to dive into C# and code most of my game in that language, I was searching for a tool to make my life a bit easier – I just love stuff that writes for me ...
Since C# is, once again, a rather Microsoft-centric thingy, there aren't that many editors out there – except for MonoDevelop, which works like a charm on many systems.
Add the factor, that MonoDevelop supports VisualStudio files – and that Unity actually can export those. With a snap you have set up MonoDevelop to work with Unity. Now add some documentation – and presto, nothing keeps me from outputting nice XML files with statistical data about the whereabouts of the player.
Well ... nothing except my apparent inability to wrap my head around the XMLWriter ...