Morrow Test
morrowtest.cloudmorrow.tech
This cloud's web app opens on its devices. Ask someone on it for an invite.
On a computer
Get the Cloudmorrow client, then use your invite to join.
Or in a terminal (macOS, Linux):
curl -fsSL https://morrowtest.cloudmorrow.tech/install.sh | sh
On a phone
Install the Tailscale app, choose a custom login server, and scan this or type https://mesh.cloudmorrow.tech.
The app then opens a page that asks for your invite.