From Rice University, Connexions offers users the ability to create content as well as to repurpose others' content to include in a course. Connexions offers textbooks, journal articles, learning objects, and assignments.
POSTED FEBRUARY 2020:
This year, we’re retiring OpenStax CNX. All community-created content within CNX will remain accessible in a read-only state for two years. We want to make sure that any current users have time to arrange alternate plans for their content. After this transition period, all of CNX’s community-created content will be housed at Internet Archive (www.archive.org), where it will be freely viewable and downloadable.