WikiNodes is an app for the Apple iPad built by IDEA.org .  WikiNodes was the first tablet app for browsing Wikipedia using a radial tree to visualize how articles and subsections of articles are interrelated. The app displays related items (articles or sections of an article), which spreads on the screen, as a spiderweb of icons. 
The App uses the SpicyNodes visualization technique which was awarded a “best for teaching and learning” award in 2011 from the American Association of School Librarians (AASL) ,  and voted # edchat’s 35 Best Web 2.0 Classroom Tools in 2010. 
The user interface is based on two display modes:
- Page view – displays Wikipedia articles in long form, similar to how they appear on the main Wikipedia web site. 
- Node view – Wikipedia Divides items into sections, items and links to related articles, similar to mind mapping .  The user can drag nodes, taps any node to display it in detail, with a panel to scroll to read the contents of the section.  This provides a visual way to see the relationships between articles.  
As of June 2011, the app supports the 36 top Wikipedia languages (by number of articles).
The app was highlighted as a “staff pick” by Apple’s US App Store , Week of May 28, 2011; As “New and Noteworthy” by Apple’s US App Store, Week of May 5, 2011; And at other times by Apple’s app stores for non-US countries.  It has been favorably covered by several bloggers, including those in the references below. 
- List of Wikipedia mobile applications – Other iOS mobile apps providing access to Wikipedia
- Radial tree – the general type of layout algorithm
- SpicyNodes – Technical visualization information
- Jump up^ Wikipedia’s ‘The Signpost’13 June 2011, In the news.
- Jump up^ Mossberg, Walt. “Encyclopaedia Britannica Now Fits Into an App.” 28-September-2011. Wall Street Journal. The article mentions WikiNodes, while discussing the Britannica app, noting that “This kind of visual array of related items is not a new idea.” In fact, there is an iPad app called WikiNodes that does something similar for Wikipedia content. “
- Jump up^ AASL. June 2011.Top 25 Websites for Teaching and Learning.
- Jump up^ edudemic.com, “The 35 Best Web 2.0 Classroom Tools Chosen By You” (August July 2010).
- Jump up^ WikiNodes: app that presents a keyword to a word association game. Ideal for expedition Wikipedia! (Japanese)AppBank
- Jump up^ “The interface presentation of information [is] similar to that of mind mapping, which I love.” – Jess Seilheimer,Digilicious
- Jump up^ “The interface is a freestyle drag and zoom that lets you jump between related articles easily.” -iPad Apps
- Jump up^ “[WikiNodes] … could redeem the way that you use Wikipedia on the iOS.” – Blake Grundman,148Apps
- Jump up^ “WikiNodes takes the huge sprawling maze of information that is Wikipedia and organizes it into a spider web of knowledge.” – Phil Hornshaw,Yahoo! News & Appolicious
- Jump up^ To see history of prior features in the Apple app store, adjust the time on thisApp Annie page
- Jump up^ WikiNodes for iPad – Making Wikipedia Fun to Explore by Patrick Jordan on May 11, 2011 /http://ipadinsight.com/ipad-app-reviews/wikinodes-for-ipad-making-wikipedia-fun-to-explore