KnowledgePicker is described as 'Community-driven catalog of learning resources. Links to resources are organized by topics (broad to specific) and rated/reviewed by users so you see which ones are the best. It's free and open for everyone' and is an website in the education & reference category. There are more than 50 alternatives to KnowledgePicker, not only websites but also apps for a variety of platforms, including iPhone, Android, iPad and Android Tablet apps. The best KnowledgePicker alternative is Wikipedia, which is both free and Open Source. Other great sites and apps similar to KnowledgePicker are Google Search, Khan Academy, Kagi Search and Goodreads.