DomainWheel - Smart startup name generator
Namelix - AI business name generator
Name Ideas Generator - A simplistic domain name generator.
Panabee - Best way to search domain names, esp for apps and startups
Naminum - A company name generator that's actually useful
dofo.com - Domain search platform Dofo.com gathers all registered (350 million) domains of the world in a single place. Dofo also brings together all the domain names that are on sale, provides useful features, all completely free.