iperf - A TCP, UDP, and SCTP network bandwidth measurement tool

XArp - XArp – Advanced ARP Spoofing Detection XArp performs advanced ARP spoofing detection mechanisms – made to secure your network.

TamoSoft Throughput Test - TamoSoft Throughput Test is a utility for testing the performance of a wireless or wired network.

Paessler PRTG - An advanced network monitoring solution to monitor network up/downtime, traffic and usage.

netperf - Netperf is a benchmark that can be used to measure the performance of many different types of networking. It provides tests for both unidirectional throughput, and end-to-end latency. - HewlettPack...

NetCut - NetCut is a Software that helps you admin your network by purely on ARP protocol.