iperf - A TCP, UDP, and SCTP network bandwidth measurement tool
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
JPerf - This project gives a better UI and new functionalities to the initial JPerf 1.
KiTTY - KiTTY is a fork from version 0.70 of PuTTY. It adds extra features to PuTTY.
TamoSoft Throughput Test - TamoSoft Throughput Test is a utility for testing the performance of a wireless or wired network.
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.