[kpmah]

I also experiment a lot with structural editing. My latest project is an editor for a lisp-like language for building small audio synth programs: http://kevinmahoney.co.uk/ocellator/

Hazel looks fantastic - I don't think I've come across it before. I think an obstacle structural editors have to becoming more widely adopted is that they start out very general and don't immediately solve a problem that people have. You can usually build little toy programs but not much more. What I've tried to do is to focus on creating an editor for a small DSL that helps with a specific problem.

[prezjordan]

Phenomenal work, this is really fun to play around with