Paperity is the first multi-disciplinary aggregator of peer-reviewed Open Access journals and papers, "gold" and "hybrid". ultimate goal is to aggregate 100% of Open Access literature, published in any place around the world, in any field of research.
BASE is a multi-disciplinary search engine for scientifically relevant web resources harvested from OAI scientific repository servers. In addition to OAI metadata the library indexes selected web sites and local data collections, which can be searched via one single search interface in one go. created and developed by Bielefeld University Library. BASEsearch