Remmina is not available for Chrome OS but there are a few alternatives with similar functionality. The best Chrome OS alternative is Chrome Remote Desktop, which is free. If that doesn't suit you, our users have ranked more than 25 alternatives to Remmina and four of them are available for Chrome OS so hopefully you can find a suitable replacement. Other interesting Chrome OS alternatives to Remmina are Termius (Freemium), Xtralogic RDP Client (Free) and Splashtop Business Access (Paid).
Termius is more than a mere SSH client – it’s a complete command-line solution that’s redefining remote access for sysadmins and network engineers. Securely access Linux or IoT devices and quickly fix issues from the comfort of your couch via laptop or phone.
Splashtop is the next-generation remote access, remote support, and collaboration solution. Splashtop is optimized for the highest remote desktop performance. It's a faster and simpler alternative to GoToMyPC, LogMeIn Pro, and other remote access solutions.