Preprint repository of papers in various areas of engineering. Directed by a steering committee of engineers and members of the engineering librarian community.
AAC is an electrical engineering society that provides free textbooks, lectures, training videos, and ancillaries. Note: AAC textbooks are distributed under a Design Science License.
A Virginia Tech project to create open electromagnetic textbooks. Two volumes are available, as well as supplemental problems, solutions, and PowerPoint slides.
An online catalog of all the images from the classical technical reference Five Hundred and Seven Mechanical Movements by Henry T. Brown. The still images are public domain for any use. The updated animations are under copyright, but freely available online.
An online resource for simplified, animated engine diagrams. The animations are not openly licensed, but educational use is encouraged. For more information see the copyright policy on the site.