nanoCH32V305 VS kmonad

If you are willing to try r/RISCV ones, then nanoCH32V203 (with two Full-Speed interfaces) and nanoCH32V305 (with one Full-Speed and one High-Speed interface) might be enough.

There are dual USB r/RISCV boards with GPIO pins exposed, like nanoCH32V203 and nanoCH32V305.

There are RISC-V MCUs that have two USB interfaces, but those are not supported by QMK yet. I tried some of those boards in kite project.

Kite has standard shortcuts option too, but it runs on dedicated MCU board, not host PC.

RISC-V boards cost $3-$6 depending if you want high speed USB or full speed one.

u/Bounty1Berry is exploring RISC-V nanoCH32V305 board, but it's a new board that is not supported by (Q|T|Z)MK yet, so not really go-to option at this stage.

Their earlier boards like nanoCH32V203 and nanoCH32V305 were more user friendly, one could flash those via USB without WCH-Link.

Muse Lab has MCU boards like nanoCH32V203 and nanoCH32V305.

It runs on nanoCH32V305 dual USB r/RISCV MCU board.

have you actually tried that? afaik they don't get you the perfect home row mods due to some limitations re. how they implement the tap vs hold logic

https://github.com/kmonad/kmonad/issues/228

I use kmonad[1] to have QMK-like functionality on any keyboard.

https://github.com/kmonad/kmonad

You can create F13-F24 purely in software with key mapping tools. On Windows, one way is with the PowerToys Keyboard Manager: remap some unimportant keys to F13, F14, etc. Another way is with KMonad (cross platform), and define the keymap with KeyF13, KeyF14, etc.

There you have the software link : https://github.com/kmonad/kmonad

Other option I would suggest for any linux user with keyboards without QMK is to try KMonad https://github.com/kmonad/kmonad