• MOOC.ORG: Massive Open Online Courses are free online courses available for anyone to enroll. MOOCs provide an affordable and flexible way to learn new skills, advance your career and deliver quality educational experiences at scale.

http://www.mooc.org

  • CREATIVE COMMONS: Creative Commons is an American non-profit organization devoted to expanding the range of creative works available for others to build upon legally and to share. The organization has released several copyright-licenses, known as Creative Commons licenses, free of charge to the public.

http://www.creativecommons.org­/education

  • OCW: MIT OpenCourseWare is a web-based publication of virtually all MIT course content. OCW is open and available to the world and is a permanent MIT activity.

https://www.oeconsortium.org/

  • OER COMMONS: it is a public digital library of open educational resources. Explore, create, and collaborate with educators around the world to improve curriculum.

https://www.oercommons.org/

  • MERLOT: this system provides access to curated online learning and support materials and content creation tools, led by an international community of educators, learners and researchers.

https://www.merlot.org/merlot/