If you want to customize some lecture notes, create a textbook  or collect some special readings for your class, Connexions might help.  It is rather like Open Courseware, but it is a wiki textbook product, and developed in modules.  Prof. Peter M. Grant from the University of Edinburgh gave a presentation about it at the Friend Center yesterday.  It was developed at Rice University but now is independently run in Houston, TX, being funded by Heulett.  It’s content is continually growing…recently consisting of 500 collections, courses, or books, and 10,500 modules or chapters of 4-8 pages.  It operates under a Creative  Commons license.  147 countries are involved.  The most prevalent language is Spanish, but there is also English, Thai, Japanese and Chinese.  All subjects are present, even though it was first developed as a Communications and Digital Signal Processing (DSP) resource.  Introduction to Music Theory is a popular text available at Connexions.  However, ~65% covers science and technology.  Anyone can contribute, become an author, and most contributions are peer reviewed at some point.  "Lenses" for quality control and review are centered at IEEE, Rice and IMS, and other institutions and individuals depending on the subjects.  One very cool application is LabVIEW which displays active analytics, for example, the graphical output readings resulting from different input filtering devices in electronics.   (More about LabVIEW. ) XML is used to store content, and texts are easily uploaded from Microsoft Word or LaTeX. 

Information about the presentation and Prof. Grant which was sponsored by: The Keller Center for Innovation in Engineering Education.