Solid list there! I love Calibre and ScummVM. Is Scumm still under development though?
It still sees active development, they keep adding new engines regularly. One of the engine I'm excited about is Macromedia Director [1] which they added initial support for in 2.5.0. That's a big endeavour though so will take time until they add everything needed for full compatibilities with a lot of games.
They've also just added support for some of the Dynamix games like Willy Beamish and Heart of China[2] which I absolutely loved as a kid (despite their rather rough edges)
[1] https://obscuritory.com/essay/macromedia-director-in-scummvm... [2] https://www.filfre.net/2018/05/the-dynamic-interactive-narra...