OAIster

The OAIster service indexes, describes and links to a wide variety of digital resources made publicly available (open access) by the research library community. You can find resources on just about any subject in a broad spectrum of formats including electronic books, preprints, white papers, images, audio files, and video files. Many of the more than 3 million resources are not indexed by most Internet search engines. These resources are created and hosted by more than 300 research libraries and institutions from around the world.