Gale eBooks provides full-text encyclopedias, almanacs, and specialized reference sources for multidisciplinary research.
Search Credo Reference - an online reference library of full-text content from encyclopedias, dictionaries, subject-specific titles and more.
EBSCO eBook Collection - Provides the full-text of thousands of books from selected academic and commercial publishers, as well as the full-text of a large number of older works in the public domain. (Formerly known as NetLibrary)
Ebook Central - A full-text multidisciplinary collection of thousands of ebooks from a wide range of publishers. (Formerly known as ebrary)