Viki for iOS
A beautifully designed Wikipedia app for iOS
Video version of Wikipedia
VideoWiki is a free multi-media encyclopedia that visualizes the sum of all human knowledge. Anyone, including you, can edit an article without even logging in.
This Beta version was launched without any front end work done on it and without the Auto-Update feature.
A modern-age Wikipedia migrating to the blockchain
Everipedia is a publicly editable, free content encyclopedia and knowledge aggregator. Everipedia differs from prevalent encyclopedias and research databases such as Wikipedia and Encyclopaedia Britannica in that it does not require a standard of notability for inclusion in the database, which many consider to be the key problem with both services.