Compleat Lexical Tutor
A complete website for learning about English and French words. You can test your vocabulary level, then work on the words at the level where you are weak. Use wordlists, online concordancer and dictionaries, texts, and a database to store your work and view the work of others. French parallel site is slightly less complete.
Keywords: ddl, concordancer, compleat lexical tutor, lexical tutor, vocabulary acquisition, tom cobb, thomas cobb, longman communication 3000, nation and waring vocabulary, word phrase frequency perl