This document lists the Alexa global rankings and brief details of various online learning and tutorial sites. The top ranked sites include TutsPlus at 1,062, Lynda at 2,495, and Udemy at 5,818. Other popular sites mentioned are Teamtreehouse, Video2Brain, Pluralsight, Informit, VTC, Infiniteskills, Total Training, Educator, and Tekpub. The document directs to a site for further updates on global rankings of online learning sites.