Hey! For the past two weeks I've been working on an online modding and analysis tool for "Chess on an Infinite Plane", and it's finally finished. You can try it out here. I also made a short guide here on how to use it and its basic functions.
Here are some screenshots of what it looks like:
Analysis mode.
Edit mode.
A board I made with all the current usable pieces. Probably not playable, but it looks cool.
I'd also like to thank @vickalan for helping me test the editor while I was working on it. Feel free to make any suggestions, or to report bugs if you find any.
Edit: You can now find the source code on github here.