Sitespeed - Sitespeed.io is an open source tool that helps to analyze and optimize website speed and performance.
Apache JMeter - Apache JMeter™.
Blackfire.io - Blackfire empowers all PHP developers and IT/Ops to continuously verify and improve their app’s performance, throughout its lifecycle, by getting the right information at the right moment.
Simple Analytics - The privacy-first Google Analytics alternative located in Europe.
Qubit - Qubit is a web personalization platform founded by former Google workers, using innovative technology to collect, store, process, and output data to optimize consumers' experiences on the web. Read more about Qubit.
Loader - Load testing and tracking application