ResearchGate is a network dedicated to science and research. StudyMode offers book notes, free essays, course notes, flashcards and other tools. Offers users the ability to upload and share publicly or privately Power Point presentations Discover incredible content through smart searches and the community. A social bookmarks manager. Using bookmarklets, you can add bookmarks to your list and categorize them. A free community for sharing instructional videos and content for teachers and students. Flickr is almost certainly the best online photo management tool. DOAJ is an online directory that indexes and provides access to quality open access, peer-reviewed journals. Directory of Open access Books is provided by OAPEN Foundation Free textbooks on the net Free teaching materials Medical and Basic Science materials