domaintyper.com is one of my new favourites and I was aware of domai.nr but found it too minimalist to be useful to me, and some minor ones you'll get through Google , or DuckDuckGo :).
Actually one of the things I learned on the project was how poorly I'd initally researched the market. There are far more competitors than I thought in this space. Many are proof of concept or prepend adjectives, some are more advanced. We are trying to be creative and we're coming up with most algorithms and UI concepts from scratch out of necessity as we're not hugely impressed with what we've seen elsewhere.
Yes we have made sales, I won't divulge the number, safe to say, not enough for me to quit my day job but we're moving on much faster than expected. Being an affiliate, as you probably know has it's drawbacks in terms of not being able to track user behaviour once they disappear into the registrar's site.
Name Toolkit doesn't merely attach words to other words randomly, or prepend random words, but if that's how it looked, then we're not doing well enough. We're working to make our search better daily and we hope that will become apparent if you re-visit.
All the best with your efforts.