Learning Objects

Creative Commons.org/Content_Directories

Creative Commons - Education

Creative Commons for Education and Research: Case Studies 

Creative Commons Australia

Finding Creative Commons Material

Creative Commons (USA)

Public Library of Science (PLoS) (refer to their terms of use) is a large rouser of scientific papers licensed under Creative Commons licences. 

National Library of Medicine USA (refer to their terms of use)

PubMed Central (refer to terms)

iCommons (UK)

Creative Commons (International)

Open Educational Commons

Public domain day –  List of works entering the public domain every first of January

Science Commons

Digital Library for Earth System Education (view terms)

Project Gutenberg Australia and Project Gutenberg. Both provide access to over 100.000 public domain works.