While before I was wondering why there aren't any good tools for this, soon I realise that is much more complex than I thought, for now we are using various existing APIs from Godaddy,DomainsBot and DataMuse with custom rules, exclusions and suggestions to make sure we deliver much better results.
It seems that the only good solution for now and something we are working on is to integrate MTurk or microworkers and generate suggestions "on-the-fly", while building a nice database of data, I am passionated about ways that we can build a smart searh/suggestion engine "backed" by humans, will see how much it makes sense.
My personal favorite is http://www.panabee.com as it plays with the phonetic of your keywords. It gives a lot of weird things but usually one or two are catchy names.
Anyway, congratulation to OP for shipping something!
The site you linked gave me an amusing one that's really simple: unctionalprogramming. Reminds me of the word "unctuous."
It even tells you whether the generated names are still available in .com, .net and .info, feel free to add even more specious extensions here.
Running it with a good-sized list of adjectives creates... well, just about the same nonsensical drivel as that which seems to be produced by many other similar tools. This one is free though...
Well, you get the drill. It is interesting to note that the list of taken domains seems to be smaller these days compared to when I made this thing, back in the heady days of dot.com.boom. Maybe folks have wizened up to the fact that all those nonsensical names started to look stale fresh out of the wrapper?
The "Check some carefully handpicked domains for you" section included Dogban.com, Guppyra.com, Cruzani.com and other completely unrelated or ridiculous things, which made my brain say "bullshit" "handpicked my ass" I would kill that section because it's a) totally useless to me and b) makes you look like liars because it is not "handpicked domains for you" it's... I dunno random crap you thought was neat? i dunno, but unless i was selling "no dogs allowed" signs (Dogban.com) everything there is just... ugh.
Particularly, I don't mind using such domains, we started for e.g revive.social and I don't see any problem with it