Searching the 'deep web' shows what high quality resources can be discovered. These resources consist of a range of open source multidisciplinary resources
BASE is one of the world's most voluminous search engines especially for academic web resources. BASE provides more than 150 million documents from more than 7,000 sources. You can access the full texts of about 60% of the indexed documents for free (Open Access). BASE is operated by Bielefeld University Library.
tED is a nonprofit devoted to spreading ideas, usually in the form of short, powerful talks (18 minutes or less). TED began in 1984 as a conference where Technology, Entertainment and Design converged, and today covers almost all topics — from science to business to global issues — in more than 100 languages
The Getty Research Institute library collections include over one million books, periodicals, study photographs, and auction catalogs as well as extensive special collections of rare and unique materials. Focusing on art history, architecture, and related fields, they begin with the archaeology of prehistory and extend to the contemporary moment.