Six Degrees of Wikipedia - Find the shortest path between two subjects
UI Cloud - The largest user interface design database in the world
Pathica - Find a path to connect with anyone on Instagram.
Sajari for Shopify - Smart search for your Shopify store
Wikipedia - Wikipedia is a free online encyclopedia, created and edited by volunteers around the world and hosted by the Wikimedia Foundation.
Reactive Search - UI components for building Amazon / Yelp like Search