I have never heard of Lean Domain Search. I have just tried it now and put in a keyword I was interested in, and it found over 4000 domain ideas in seconds! Thanks for sharing this info, Jeff.
The links are great, especially Lean Domain Search! The number of suggestions based on keyword is really helpful. I usually go to domain registrars to find available domains and I enter the domains manually. Name generators like these are very helpful to find new ideas.