Buildkite - Buildkite is a platform for running fast, secure, and scalable continuous integration pipelines on your own infrastructure.
Apache JMeter - Apache JMeter™.
Kualitee - Your next ALM alternative for Requirements planning, test case management, and issue tracking for both manual and automated testing.
Selenium - Selenium automates browsers. That's it! What you do with that power is entirely up to you. Primarily, it is for automating web applications for testing purposes, but is certainly not limited to just that.
RainforestQA - Insanely simple testing. Create tests for your website in plain English, then run them across all major browsers with a single click. Powered by human intelligence
locust - An open source load testing tool written in Python.