Finding any information in Wikipedia or dictionary is easier than finding a contact in your phone! Tap in just a few characters and you can search and find any Wikipedia topic or any English word. One more tap and you can watch videos relevant to the topic, or listen to how the word is pronounced. Wikitap is a great reference for Encyclopedia, Pronunciation, Thesaurus and more.
What's more, you can actively participate by adding videos or pictures to a wikipedia topic of your interest.