For the Zechub hackathon recently, I pulled together a frost-based wallet application that might be of interest. Its really raw/hacked-together so definitely some optimizations that it could use.
I built into the application that the server portion users can either self-host or connect to a dedicated url. For the user that fires up the server (and will share with users) I made a disopsable cloudflared tunnel that creates a url for easy sharing. Definitely a place to improve would be to use something like Tor (if possible) or even tailscale for people that coordinate in a small group to make it work. Planning on scoping the tailscale serve portion within the tool here soon.