Classic Macintosh software can be created using [[https://github.com/autc04/Retro68|Retro68]].

Documentation
Inside Macintosh: [[https://dev.os9.ca/]]

PLD archive:
[[https://wiki.pldarchive.co.uk/index.php?title=Category:Macintosh]]

256 colors on SE/30:
[[https://zigzagjoe.com/30Video.html]]