This is a place for all of us to share OER sites we've found. Just click the Edit button to add to this. Thanks for sharing!

(Please make sure the sites you list are open licensed and include the license if possible.)

Clipart

Openclipart.org provides clipart which is mainly original or remixed work with some captures from public domain works. All files are specifically released with/into public domain "license." Files may be taken in PNG format or SVG format. SVG has the advantage of making the graphics easy to modify and resize without loss of resolution. If you plan to re-work the graphics, the Inkscape program is a suitable open source tool with versions for Mac, Windows and Linux.

Photos

http://www.geograph.org.uk/  From the Web site: "The Geograph Britain and Ireland project aims to collect geographically representative photographs and information for every square kilometre of Great Britain and Ireland..."  Creative Commons licensed, contributore identified.

Courses

MIT Open Courseware - http://ocw.mit.edu/index.htm  Lectures, video, multimedia and notes from a large collection of MIT courses.