Remotix Quick Connect
Remotix QC is a tiny portable application with zero configuration. Run it on a computer that you want to observe or control remotely.
QC for macOS
Current version: 1.2 (12773). Requires macOS 10.9 or later.
QC for Windows
Current version: 1.2.0 (4145). Requires Windows 7 or later.
QC for Ubuntu/Debian Linux (x86_64) (.deb package)
Current version: 1.2 (200). Requires X server. Wayland is not supported yet.
We've tested it on Debian 9 (Stretch), Debian 10 (Buster), Ubuntu 18.04.2 LTS (Bionic Beaver) and Ubuntu 19.04 (Disco Dingo).
QC for any Linux (x86_64) ( .tar.gz package)
Current version: 1.2 (200). Should work on any recent Linux distribution with X server.