"SPARC®, the Scholarly Publishing and Academic Resources Coalition, is an international alliance of academic and research libraries working to create a more open system of scholarly communication. SPARC believes that faster and wider sharing of the outputs of the scholarly research process increases the impact of research, fuels the advancement of knowledge, and increases the return on research investments. SPARC focuses on taking action in collaboration with stakeholders – including authors, publishers, and libraries – to build on the unprecedented opportunities created by the networked digital environment to advance the conduct of scholarship." (http://www.sparc.arl.org/about#sthash.Bi8oUFCn.dpu)
A coalition of patient groups, physicians, researchers, educational institutions, publishers, and health promotion organizations that support barrier-free access to taxpayer-funded research.
Below is a partial list of some sites that offer OERs or that link to sites that offer OERs. Many of the sites allow users to create a free account and to search for and save OERs as well as to create new OERs and share them with others.