Terms such as "public domain", "open access", "creative commons", "openly accessible", "copyleft", and "royalty-free" are often noted on works. Some of these are used interchangeable but they are not synonymous. A quick definition of these terms:
About CC Licenses (Creative Commons)
Find sources for public domain, open access, and Creative Commons licenced items by type of format
Some links / sources of open access, public domain, and Creative Commons licenced items (not exhaustive). Links may be for the open or Creative Commons licenced category in larger copyrighted fee-based sites
Check licence and usage terms carefully. Although attribution may not be required by the licence terms, MtA recommends you still cite your source
Books
Audio Books
Some links / sources of open access, public domain, and Creative Commons licensed items (not exhaustive). Links may be for the open or Creative Commons licenced category in larger copyrighted fee-based sites
Some links / sources of open access, public domain, and Creative Commons licensed items (not exhaustive). Links may be for the open or Creative Commons licensed category in larger copyrighted fee-based sites
Check licence and usage terms carefully. Although attribution may not be required by the licence terms, MtA recommends you still cite your source
Open Textbook Repositories in Canada
Open Textbook Repositories outside of Canada
Some links / sources of open access, public domain, and Creative Commons licensed items (not exhaustive). Links may be for the open or Creative Commons licensed category in larger copyrighted fee-based sites
Check licence and usage terms carefully. Although attribution may not be required by the licence terms, MtA recommends you still cite your source
Some links / sources of open access, public domain, and Creative Commons licensed items (not exhaustive). Links may be for the open or Creative Commons licensed category in larger copyrighted fee-based sites
Check licence and usage terms carefully. Although attribution may not be required by the licence terms, MtA recommends you still cite your source
Kaggle - free but requires registration
Data.Gov.Uk - UK open data site
Some links / sources of open access, public domain, and Creative Commons licensed items (not exhaustive). Links may be for the open or Creative Commons licensed category in larger copyrighted fee-based sites
Check licence and usage terms carefully. Although attribution may not be required by the licence terms, MtA recommends you still cite your source
Music
Scores
Some Sources for Open Access Government Documents
MtA's Government Documents subject guide
Catalog of U.S. Government Publications - Finding tool for electronic and print publications from the legislative, executive, and judicial branches of the U.S. government