Hundreds of libraries and archives exist online, from university-supported sites to individual efforts. Each one has something to offer to researchers, students, and teachers. This list contains over 250 libraries and archives that focus mainly on localized, regional, and U.S. history, but it also includes larger collections, eText and eBook repositories, and a short list of directories to help you continue your research efforts. The sites listed here are mainly open access, which means that the digital formats are viewable and usable by the general public.
Found over at: The J-Walk Blog