Iperf is a neat little tool with the simple goal of helping administrators measure the performance of their network. Worthy of mention is the fact that it can measure both TCP and UDP performance on a network. Iperf is cross platform software and open source.
What's new in version 1.0
ReleaseMay 30, 2013
Date AddedMay 30, 2013
Operating SystemsWindows, Windows XP, Windows Vista, Windows 7