DomainWheel - Smart startup name generator
Lean Domain Search - Find a Great Domain Name w/ twitter handle availability
Namelix - AI business name generator
Panabee - Best way to search domain names, esp for apps and startups
Mashword - Find a name and register a domain for your business, baby, project, and more. Mashword is a powerful company and human name generator that determines the pronunciations of entered words and then creates unique combinations and variations.
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.