I've been experimenting a bit with adding more keyboard bindings to the Anvil editor. Since it doesn't seem to have a git repository, I made my own so I can keep track of the patches.
I plan to force-push with abandon.
https://src.alexschroeder.ch/anvil.git
@alex oh wow it's in Go!
If you manage to get rid of dependency on the third mouse button, I'll be happy. It's like the thing that keeps me away