MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
PortMapper - Do you need to map a specific TCP or UDP port on your machine to another port on another machine?
KiTTY - KiTTY is a fork from version 0.70 of PuTTY. It adds extra features to PuTTY.
netcat - Netcat is a featured networking utility which reads and writes data across network connections...
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.
Komodia Relay - Free open source tool to perform TCP based session relay