OER Commons is a freely accessible online library located at www.oercommons.org that provides a web-based infrastructure for teachers and others to search and discover Open Educational Resources (OER) and other freely available instructional materials
"Open Education Europa portal is to offer access to all existing European Open Educational Resources in different languages in order to be able to present them to learners, teachers and researchers."
"The Gateway has been serving teachers continuously since 1996 which makes it one of the oldest publically accessible U.S. repositories of education resources on the Web."