MERLOT (Multimedia Educational Resource for Learning and Online Teaching) is a collection of links, organized by subject: Arts, Humanities, Social Sciences, Science and Technology, Mathematical, Economy and Education. Everyone can search or browse the links collection but those interested in adding sites or review the existing sites must register as members (membership is free). MERLOT also wants to be a community of people who are involved in education. If this is your case then consider visiting this excellent resource.