Project Gutenberg is a volunteer effort to digitize and archive cultural works, to "encourage the creation and distribution of eBooks". It was founded in 1971 by American writer Michael S. Hart and is the oldest digital library. Most of the items in its collection are the full texts of books in the public domain. The Project tries to make these as free as possible, in long-lasting, open formats that can be used on almost any computer. As of 2020, Project Gutenberg had reached 62,108 items in its collection of free eBooks. More information...
In June 2020 the website gutenberg.org was on the 417th place in the ranking of the most reliable and popular sources in multilingual Wikipedia from readers' point of view (PR-score). If we consider only frequency of appearance of this source in references of Wikipedia articles (F-score), this website was on the 657th place in June 2020. From Wikipedians' point of view, "gutenberg.org" is the 435th most reliable source in different language versions of Wikipedia (AR-score).
The website is placed before iaaf.org and after grammy.com in multilingual PR ranking of the most reliable sources in Wikipedia.
Popularity and reliability assessment of sources in references of Wikipedia in different languages. Data extraction based on complex method using Wikimedia dumps in July 2020. To find the most popular and reliable sources we used information about over 200 million references of Wikipedia articles. More details in the research "Modeling Popularity and Reliability of Sources in Multilingual Wikipedia". Values for PR-score and AR-score were additinaly increased 100 times (to distinguish smaller values in the ranking).