I would expect GIS professionals to use ESRI or QGIS. This is an interesting showcase. It seems a little too simple given the variety of options for geographic projection. I’m not quite sure what the value proposition is, but it’s interesting.
I’m not sure how useful they might be for professionals who use ESRI or QGIS, but I know I needed tools like that for the game’s development and couldn’t find anything easy to use and simple — at least not all in one place.
So technically, this site is a result of another project.