Since you are releasing the source code too that is highly useful. I imagine it could be quickly customised to fit whatever game engine its intended for that way.
Exactly

I have also updated the EzMap editor download link to the latest version (12.1124) if you want to grab that. No additional source code since the original download but I will add it when I've finished a few more routines that I want to include.
The latest version has a data layer which can be edited to provide numerical properties (other than the tile value which you know from the graphic used) to each tile in the tileset. This used in its most basic form would be to set say floor and wall tiles (0 = no collision, 1 = solid). Once these are set in the blockscreen each time they are used in the map editor the tiles will have the properties already pre-defined. In addition when in map mode with dataedit enabled you can copy and paste data values into other map tiles directly. I'm sure you will work out how best you can use this in your games

The datasheets are included as png's as it allow the user to amend the file to depict say water, air current (strengths), lights, switches etc...
There are a few other bits and pieces added, such as loading and saving (proper format) with additional RLE compression to be added whilst maintaining map compatibility. A tile data information file (.tdi) is saved in the same folder as the imported tilesheet and this has the details of any numerical data edited in the tilesheet. Deleting the .tdi will default to the original tile data values. Easier to use than explain I guess.