Project Gutenberg offers over 50,000 free ebooks: choose among free epub books, free kindle books, download them or read them online. We carry high quality ebooks: Our ebooks were previously published by bona fide publishers. We digitized and diligently proofread them with the help of thousands of volunteers.

Massachusetts Institute of Technology is one of the forerunners in open courseware, making "virtually all MIT course content" available online for public access.

Hippocampus offers educators a wide variety of multimedia content online, including videos, animations, and simulations. An additional feature offers educators the ability to create "playlists" for their students, which correlate specifically to their particular instruction material.

The Open Course Library (OCL) is a collection of shareable course materials, including syllabi, course activities, readings, and assessments designed by teams of college faculty, instructional designers, librarians, and other experts.

Europeana.eu is the EU digital platform for cultural heritage. More than 3,000 institutions across Europe have contributed to Europeana. These range from major international names like the Rijksmuseum in Amsterdam, the British Library and the Louvre to regional archives and local museums from every member of the European Union. Together, their assembled collections let users explore Europe's cultural and scientific heritage from prehistory to the modern day.

The WDL makes it possible to discover, study, and enjoy cultural treasures and significant historical documents on one site, in a variety of ways. Content on the WDL includes books, manuscripts, maps, newspapers, journals, prints and photographs, sound recordings, and films.