From the website: "With Manifold, you can publish dynamic digital texts with rich media support, powerful annotation tools, and robust community dialogue. Manifold transforms scholarly publications into living digital works. This CUNY installation serves as a free publishing platform for the CUNY community, where you can create projects to house either your own scholarship or custom classroom versions of texts and textbooks that are openly licensed or in the public domain."
Access to their OER database and student projects, as well as a form for permissions to share your own digital projects.