Word Puzzles Websites
vocabulary.com
Vocabulary.com helps you learn new words, play games that improve your vocabulary, and explore language.
3,596 
$ 3,967,920.00
manythings.org
A free study site for English as a Second Language (ESL) students with games, quizzes, puzzles, MP3 files with transcripts, listening practice, pronunciation practive, etc.
17,679 $ 759,600.00
eslgamesworld.com
Fun Games for ESL Teachers and Students, Powerpoint Games, Games for Kids, Printable Board Games and Poker Card Games, Interactive Games and Game Templates for ESL Lesson Plans,...
73,755 $ 182,160.00
phrontistery.info
English obscure words and etymology resources: online dictionary of weird and unusual words, word lists, technical vocabulary aids, lipograms, and word related essays
178,065 $ 62,400.00