MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
Firezone - Firezone is a remote access platform that’s painless to deploy, easy to manage, and built on WireGuard® to be blazing fast. Best of all it's self-hosted and open-source.
KiTTY - KiTTY is a fork from version 0.70 of PuTTY. It adds extra features to PuTTY.
Viscosity - Viscosity is a VPN client for Mac OS X and Windows.
Console - Console is a Windows console window enhancement.
fruho - fruho is an open-source, zero-configuration VPN manager.