Domainz.io - Premium domains, for not so premium prices
TrackDuck - Visual feedback for web design and development.
estibot - Domain name valuation
Valist - Automatically created staging environments for every update with a shareable link for testing
Park.io - The best place to backorder/drop purchase expiring ccTLD domain names.
Usersnap - Usersnap is a customer feedback software for SaaS companies that need to constantly improve and grow their products.