I ha operating system design which I had not even made up a name yet. (It involves proxy capabilities, hypertext file system, multiple locking, programs that the user can program to work together, message passing, structured data, Extended TRON Code, and many other ideas.) But, I would hope to make the discussion about it, to improve and to design some of the details (such as ABI, system calls, file formats, etc; I would propose some (I wrote some ideas so far), anyone (myself and others) could propose and criticize them, etc)
I also have Free Hero Mesh, which is good enough to be used now although it lacks installers, and the puzzle catalog service, etc; and is meant only on GNU/Linux; so you would have to compile and set it up by yourself, although hopefully people who are able to port it, and other help with it. (Also a few features are missing; e.g. currently font sizes are limited to 8x8, and there is no music (although sound effects are implemented).)
Yes (and I did post some on here in the past), although better would be on Usenet, or on my own NNTP server if I add a newsgroup for such a discussion.
I had written a list of some keysyms possibly might be used in the GUI system (the IME and other things may convert key codes into a sequence of keysyms). I had also written a list of some ideas about what kinds of structures may be available in the common file format. I also wrote some things about the default window manager, and about the window "indicators" (which ones are present depends on the program, but allows control over e.g. audio volume, network access, etc, independently for each program while the programs are running). I also have ideas about network transparency, synchronization, emulation, command-line, and others. It is a combination of command-line and GUI and you can use both together (most existing systems don't really work them as very well together as they could be). And, I have the idea of what things will be avoided by this system (USB, UEFI, telemetry, Unicode, bad-for-advanced-users, too many worthless fancy animations, Digital-Restrictions-Management, etc). However, these things are not currently published (and some are also not on the computer; I wrote some of them on a paper).
(Much of it is implemented in terms of proxy capabilities, which is perhaps the most important feature, but the other features are also important.)
I also have Free Hero Mesh, which is good enough to be used now although it lacks installers, and the puzzle catalog service, etc; and is meant only on GNU/Linux; so you would have to compile and set it up by yourself, although hopefully people who are able to port it, and other help with it. (Also a few features are missing; e.g. currently font sizes are limited to 8x8, and there is no music (although sound effects are implemented).)