Digital Public Library of America - New: A collaborative resource for libraries, museums, and historians. A great source for photos, especially from New England.
Hathi Trust Digital Library - a not-for-profit collaborative of academic and research libraries preserving 17+ million digitized items
NewsBank - Access World News from reliable sources
OASIS - A search tool that aims to make the discovery of open content easier. OASIS currently searches open content from 97 different sources and contains 388,670 records.
Open Access Digital Library - Includes over 12,000 journals from over 80 databases. All content is free to the end user. The best way to use this site is to search by name for a particular journal. If you don't have a name, you can also browse by journal subject to find journals in a particular subject area.