According to the Merlot website:
Merlot is a free and open online community of resources designed primarily for faculty, staff and students of higher education from around the world to share their learning materials and pedagogy. Merlot is a leading edge, user-centered, collection of peer reviewed higher education, online learning materials, catalogued by registered members and a set of faculty development support services.In particular, I commend the Learning Materials available on the Merlot website, which includes over 27,000 resources supporting virtually every academic discipline in higher education. All content on the Merlot website is licensed for open-source access under Creative Commons, which means that Merlot's resource materials can be used freely by most educators. Merlot is also a place to find and meet new colleagues in every academic discipline.
Follow the link below to learn more about Merlot. Membership is free.