Description: Project Gutenberg is an online library containing over 60,000 free eBooks. The eBooks are available in epub, Kindle, HTML and simple text formats. The library focuses on public domain content.
Type: software
Description: Wolfram Alpha is a computational knowledge engine that allows users to get instant expert-level answers to questions on math, science, and many other topics by typing queries in plain language. It understands and computes answers across many domains.
Type: software