NetIO-GUI!

LAN Speed Test is a FREE utility designed to accurately measure LAN speeds. It does this by writing a file (you choose the size) to a folder (again you choose), clears windows file cache (otherwise read times would be skewed with results way too high), reads the file back, clears the cache again, deletes the file, and displays the results. LAN Speed Test is a portable windows application that works with windows 98SE, WindowsME, Windows 2000, Windows 2003, Windows XP, Windows Vista, & Windows 7. Just Download and run. No installation needed, no dll's and leaves nothing in your windows registry.For the newer and better Version 2.0 registration you pay $5.00 per Paypal: http://www.totusoft.com/lanspeed2.html »

LANBench is a simple LAN / TCP Network benchmark utility. It is designed for testing network performance between two computers and is based on Winsock 2.2. LANBench tests TCP performance only and is designed for minimal CPU usage so that the pure performance of your network could be fully tested.

A utility for testing the performance of a wireless or wired network that sends TCP and UDP data streams and computes important metrics: upstream and downstream throughput values, packet loss, and round-trip time, etc. It supports both IPv4 and IPv6 connections.