Maybe you can extend the description a little bit more to tell people what this is meant for. (I havent tried it yet, since I am usually on a Mac.) But from “Windows application to help with OpenType feature development” I don't get the full scope of this application.
Would I use that for fonts without OpenType features? Or to check/modify existing features? Is there a main difference to the OT editors of FontLab Studio, FontForge and so on?

Sorry. I introduced the tool back in April with a different post here: Any interest in Windows tool for editing features?. It is a stand-alone Windows application that automatically generates OpenType feature code based on font information it collects from an AFM file and outputs that code as a feature (FEA) file.

I'll take a look at this, seems interesting. How does it compare with VOLT?

I am honestly not very familiar with VOLT, but I suspect that tool is probably more flexible and powerful. This little editor tool is intended to speed up the development of OpenType features in a workflow where another tool handles other aspects of font development. For example, I use FontLab Studio or a combination of Illustrator and FL to create the glyphs and make the font. I wanted a quick and easy way to automatically generate OpenType features from all those small cap, oldstyle, alternate, ligature glyphs I already created.

Thanks for any feedback you can offer. I'm looking for reports of problems as well as suggestions for improvement.