MOOCs - online courses from universities

https://www.futurelearn.com

https://www.edx.org

https://www.coursera.org

https://www.open.edu/openlearn/free-courses/full-catalogue

Resources to help you explore a subject in greater depth

https://www.univ.ox.ac.uk/applying-to-univ/resource-hub/

https://www.myheplus.com

Online lectures and talks

https://www.gresham.ac.uk/watch/

https://ed.ted.com

https://www.ted.com

University of Essex webinar series. 

Podcasts/radio

www.bbc.co.uk/sounds

University content on iTunes U

Free e-books and newspapers

www.free-ebooks.net

From Idea Store: Newspapers and magazines   Audiobooks and e-books