Tool.Domains - Search free to register expired domains

Duolingo - Duolingo is a free language learning app for iOS, Windows and Android devices. The app makes learning a new language fun by breaking learning into small lessons where you can earn points and move up through the levels. Read more about Duolingo.

Brandpa - Domain names for startups

Synonymful - Improve your vocabulary and communicate like a pro.

BrandBucket - The original marketplace for business names and creative domain names.

Fluent - Fluent is a people-based marketing platform that uses real-time, one-to-one interaction to create custom audiences and serve personalized ads that drive performance at scale.