Dictionary.com This app gives you information from Dictionary.com and Thesaurus.com. It also has audio pronunciations and a voice to text search. You can also see "word of the day"
Wiki Encyclopedia This app is your fast access to wikipedia through your phone. You can also access Wikitravel through the app
Urban Dictionary This app lets you look up words that are now turned into slang. You can also have a widet, share words, access the daily word, pick a random word to learn about, star your favorites and access the history.