AbTest.io - A free url shortener with A/B testing features
Buildkite - Buildkite is a platform for running fast, secure, and scalable continuous integration pipelines on your own infrastructure.
GoodUI Evidence - People's A/B test results that show which UI ideas work best
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
PreFlight - Preflight is an Automated Web Testing tool. Allows everyone to automate Web UI tests.
Kualitee - Your next ALM alternative for Requirements planning, test case management, and issue tracking for both manual and automated testing.