Fortio load testing library, command line tool, advanced echo server
Scalable open source load testing tool
HTTP load testing tool and library. It's over 9000!
High-performance load testing tool, written in Golang
Desktop app that helps you craft Gatling load-testing simulations
Winrk is an HTTP benchmarking tool for Windows users, inspired by wrk.
The Swiss Army knife for testing and monitoring
R-U-Dead-Yet? (RUDY) Original source code files
SlowHTTPTest Original files
Distributed load testing framework - Java, Jython, or Clojure scripts.
Java based load testing tool for HTTP applications.
A concurrency and load testing tool for .NET applications