MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
Userify - Userify is a cloud-based SSH key management solution.
KiTTY - KiTTY is a fork from version 0.70 of PuTTY. It adds extra features to PuTTY.
Ganymed SSH-2 - Ganymed SSH-2 for Java is a library which implements the SSH-2 protocol in pure Java.
ConEmu - ConEmu-Maximus5 is a full-featured local terminal for Windows devs, admins and users. Get better console window with tabs, splits, Quake style, copy+paste, DosBox and PuTTY integration, and much more.
SecureBridge - Сlient and server components for SSH, SFTP, FTPS, SSL, HTTP/HTTPS, WebSocket, and SignalR protocols