Practice.dev - Practice programming for free
AbTest.io - A free url shortener with A/B testing features
CodeDammit - Learn programming by looking at real code examples
Anboto - Anboto provides web customer service and e-Commerce technology based on semantics and natural language processing.
Pre-Launch Widget Templates - 100+ widgets for your pre-launch campaigns
GoodUI Evidence - People's A/B test results that show which UI ideas work best