I built a classic Macintosh text editor that allows users to do shared bidirection live editing with a web browser on a modern computer. Essentially it allows allows you to really quickly and easily share and edit text snippets on a classic Macintosh. I've tested the software on System 2.0 through System 7.6.1, but it should work on all PPC and 68k Macintoshes running up to MacOS 9.2.2 assuming they have a modem serial port available.In addition to the github repository, I wrote up a blog post here: https://henlin.net/2022/10/02/Introducing-FocusedEdit-for-cl... outlining how to get up and running. Both the repo and the blog post have a demo gif to help explain exactly what FocusedEdit does as well as how it works.
If you have any questions or decide to try it out on your Macintosh or in an emulator, let me know! I'd love to hear about it!