Ebook Central provides authoritative, full-text e-books in a wide range of subject areas along with powerful tools to find, use, and manage the information.
The Internet Archive is a center for digital memory. Billions of webpages have been archived along with 28 million books, 14 million audio recordings, 6 million videos, 3.5 million images, and almost 600,000 software programs. They add another 1000 new digital books every day. Using their Wayback machine tool, you can archive any site you want to keep, regardless of how the owner changes it.
a collection of public domain and copy-permitted historical texts presented cleanly (without advertising or excessive layout) for educational use. Primary sources are available here primarily for use in high-school and university/college courses. From the outset the site took a very broad view of the sources that should be available to students and as well as documents long associated with a western civilization approach to history also provides much information on Byzantine, Islamic, Jewish, Indian, East Asian, and African history. You will also find many documents especially relevant to women's history and LGBT studies.