Academic Commons (http://www.academiccommons.org/)
College Open Textbooks (http://collegeopentextbooks.org/)
Community College Consortium for Open Educational Resources (http://oerconsortium.org/)
Digital Public Library of America (DPLA) (http://cnx.org)
OER Commons: Open Textbooks (http://www.oercommons.org/)
Ohio Digital Bookshelf Project (http://ohiodigitalbookshelf.ning.com/)
Open Course Library (http://opencourselibrary.org/)
Open Courseware Consortium (http://www.ocwconsortium.org)
OpenStax College (http://openstaxcollege.org/)
Open Textbook Catalog ( https://open.umn.edu/opentextbooks/)
Student PIRGs: Open Textbooks (http://www.studentpirgs.org)
Textbook Media (http://www.textbookmedia.com/)
Textbook Revolution (http://textbookrevolution.org/)
The Global Text Project (http://globaltext.terry.uga.edu/)
World Lecture Hall (http://wlh.webhost.utexas.edu/about/index.cfm)
There are several resources that might be useful to the instructor who would like to know more about the open edudcation movement and how to teach with open education resources.
This is a collection of readings on open education with commentary created for a gradaute course at Brigham Young University and edited by David Wiley. It includes chapters on intellectual property, free software, open source, open content, open textbooks, and research in open education.
This handbook is a deliverable of the LinkedUp Project, and is a primer on the open education ecosystem, information about useful tools and software, references, a glossary of commonly used terms, case studies and examples, and answers to frequently asked questions.
Dr. Rory McGreal, the UNESCO/Commonwealth of Learning Chair in Open Educational Resources shares his expertise in a series of 10 short, informative videos that address the what, why, where, and how of OER. Please note that this is Canada-based and therefore one of the chapters is "Where to find quality French-language Open Educational Resources".
A masters thesis by Danielle Paradis out of Royal Roads University, Victoria, BC. Of particular interest is Chapter 4, Results. It includes quotes from teachers on how they found out about OERs, their experience teaching with them, and motivations behind use.
There are new tools available that allow teachers to gather content from numerous places into one platform. Here are a few examples.