OER Commons is a digital hub created by the Institute for the Study of Knowledge Management in Education offers 73,000 kinds of OER, along with tools for creating OER, training on how to use OER and the ability to create OER “Commons” — groups that share resources for a given purpose.

OER Commons Link

The Open Course Library is managed by the Washington State Board for Community and Technical Colleges, this content is organized by course.

Open Course Library Link

OpenStax CNX is a dynamic non-profit digital ecosystm delivering educational content to improve learning outcomes.

There are tens of thousands of learning objects, called pages, that are organized into thousands of textbook-style books in a host of disciplines, all easily accessible online and downloadable to almost any device, anywhere, anytime.

The best part? Everything is available for free thanks to generous support from Rice University and several philanthropic organizations.

Open Stax Link’

MyOpenMath is a free, open source, online course management system for mathematics and other quantitative fields. MyOpenMath’s primary emphasis is to facilitate the creation and implementation of online homework and assessment, although it also supports content delivery on a limited basis.

MyOpenMath.com is operated by the non-profit organization MyOpenMath.

myOpenMath Link

This is just a listing site for publicly available open textbooks, maintained by a teacher. Print copies are made available through third party print-on-demand companies. Many of the courses have course packages available through MyOpenMath.com, which provides free online homework for several open math textbooks.

Khan Academy is a nonprofit organization providing free, world-class education for anyone, anywhere.

Khan Academy Link