Domainz.io - Premium domains, for not so premium prices
Decidr - Make better decisions with quick A/B polls
Newsy - Monetize your un-used domains and turn them into your own content aggregator with 0 code!
Go Fucking Do It - Set a deadline and a price. If you fail, you pay.
Tool.Domains - Search free to register expired domains
AbTest.io - A free url shortener with A/B testing features