That’s interesting. I’ve never heard of the Delphin Assistant package for SublimeText. Although their “[incr tsdb()] syntax” is really the
make_item syntax. It looks like a UW student made the package (the GitHub account associated with the Delphin Assistant package has a Matrix grammar with the user’s email in the choices file, but they seem to avoid using their real name so I won’t repeat it here). I don’t use it anymore but SublimeText is a great editor; I recommend it to people who need a good editor and aren’t already converted to Emacs or vim.
As for other editors, Joshua and I (separately) wrote TDL syntax plugins for vim at one point.
Also I imagine Glenn wrote a TDL editor into his agree GUI?