Endless - Random and amazing Wikipedia articles.
WikiPrank - Prank your friends with fake wiki articles.
Wikipedia - Wikipedia is a free online encyclopedia, created and edited by volunteers around the world and hosted by the Wikimedia Foundation.
V for Wiki - A beautifully designed Wikipedia app for iOS
Daily Curiosity for iOS - The top 5 things to learn on Curiosity.com, delivered daily.
Wikids - An encyclopedia that talks to your kids