I stumbled across the GitHub page by chance. I've been looking for an alternative to Terminus for quite some time. Termix looks really good. Very nice web interface. It's still a bit buggy in a few places, but it's quite usable.

"Termix is a web-based server management platform with SSH terminal, tunneling, and file editing capabilities. Here, you can find the repositories for the main Termix server, along with the mobile app, documentation, and support"