Lexcavator is a great word game by Adam Parrish that you can pay what you want for (don’t be that guy that pays nothing).
Coolest thing about it:
I use Markov chains to keep related sequences of letters adjacent in the game board. The goal is to make a faster-paced word game where it’s easy to find meaty words.
And it tells you when you’re the first person to guess a word in the game!