Website address: www.gutenberg.org
Project Gutenberg is a volunteer effort to digitize and archive cultural works, in order to “encourage the creation and distribution of eBooks;” I am amazed at the volume, content, and quality of the material available on Project Gutenberg. Founded in 1971 by Michael S. Hart, it is the oldest known digital library. Most of the items in its collection are the full texts of public domain books. The project tries to make these as free as possible, in long-lasting, open formats that can be used on almost any computer. Project Gutenberg claims over 30,000 items in its main collection, adds about 50 books each week, and through its affiliate sites listed on the main webpage offers over 100,000 books for free download. Project Gutenberg is affiliated with many projects that are independent organizations which share the same ideals, and have been given permission to use the Project Gutenberg trademark and are linked to the main Project Gutenberg site.
Wherever possible, the releases are available in plain text, but other formats are included, such as HTML, PDF, EPUB, MOBI and Plucker. Most releases are in the English language, but many non-English works are also available. There are multiple affiliated projects that are providing additional content, including regional and language-specific works.