AbTest.io - A free url shortener with A/B testing features
Basil Chat - Design feedback via chat
GoodUI Evidence - People's A/B test results that show which UI ideas work best
Planogy - A feedback platform for all the creative work
PreFlight - Preflight is an Automated Web Testing tool. Allows everyone to automate Web UI tests.
Feedback by Pixelic - Painless design feedback and version control.