Class Central • Discover Free Online Courses & MOOCs. Class Central • Discover Free Online Courses & MOOCs. 7+ Best MOOC Aggregators For Free Online Courses — Knowledge Lover. MOOC aggregators are search engines for free courses, – in simple terms. They gather relevant information from various websites and present to you. Here are some of the best ones available out there: Are you ready? Bookmark this article as a resource you can refer to later in your journey to learn new things everyday. 1. 5. Last update: 13th February 2016 7+ Best MOOC Aggregators For Free Online Courses was last modified: March 8th, 2016 by Gaurav Dhiman. MOOC List | A complete list of Massive Open Online Courses (free online courses) offered by the best universities and entities.