Project Gutenberg offers over 50,000 free ebooks: choose among free epub books, free kindle books, download them or read them online.
Google Scholar provides a simple way to broadly search for scholarly literature. From one place, you can search across many disciplines and sources: articles, theses, books, abstracts and court opinions, from academic publishers, professional societies, online repositories, universities and other web sites.
UReddit hosts courses and lessons created by the public and can help users to learn languages, scientific principles or even PHP programming.
Edx is one of the world’s leading MOOC platforms. MOOCs (massive open online courses) are offered for free to anyone wishing to learn.
Lit Genius is a place where scholars have formed a community to annotate poetry and literature, both classic and recent. Extremely helpful for English literature students.
Bartleby publishes classic literature, poetry, non-fiction and reference texts free of charge.
TED hosts thought-provoking talks given at events all over the world on the core topics of technology, entertainment and design – but in fact covering pretty much every aspect of human experience. The TED site is where you can find all the videos of these talks. Another good procrastination device, but you may also find some inspiration for your next essay.
Revision Aid is a project which has the purpose of providing a free online educational service aimed to help with students’ studies and revision.