Open Nettest - Open Nettest is a platform for collecting, processing and visualizing data related QoS and QoE.
iperf - A TCP, UDP, and SCTP network bandwidth measurement tool
LibreSpeed - Self-hosted Speedtest for HTML5. Easy setup, examples, configurable, mobile friendly.
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...
TamoSoft Throughput Test - TamoSoft Throughput Test is a utility for testing the performance of a wireless or wired network.
SmokePing - Smokeping is a tool for measuring latency.