Archive.org is a digital library and internet archive that provides access to a wide range of content, including books, websites, software, music, and other media. The collection at Archive.org is vast and varied, and includes materials from a wide range of sources and time periods. Some of the highlights of the collection include the Wayback Machine, which allows users to access archived versions of websites; the Open Library, which provides access to over 4 million books; and the Netlabels collection, which includes a wide range of music from independent artists. In addition to these resources, Archive.org also hosts a variety of other collections, including texts, audio recordings, and videos, covering a wide range of subjects and topics.

Project Gutenberg is an online library that provides access to a wide range of ebooks that are in the public domain. The collection at Project Gutenberg includes over 60,000 free ebooks, and is constantly growing as new materials are added.

One of the key features of Project Gutenberg is that all of the ebooks in its collection are in the public domain, which means that they are available for anyone to use and distribute without the need for permission or payment. The ebooks in the collection include a wide range of genres and subjects, including literature, history, science, and more.

Project Gutenberg is a volunteer-run organization, and all of the ebooks in its collection are made available through the efforts of volunteers who digitize and proofread the materials. The organization was founded in 1971 with the goal of making classic literature and other important works more widely available to the public.

Open Culture is a website that provides access to a wide range of free educational and cultural resources, including online courses, ebooks, audio books, films, and other media. The site is curated by a team of editors who select and organize the materials available on the site, and is designed to be a one-stop destination for anyone looking to access high-quality educational and cultural resources online.

One of the key features of Open Culture is that it provides access to a wide range of materials from a variety of sources, including universities, museums, and other cultural institutions. The site includes resources in a wide range of subjects, including art, literature, history, science, and more, and is a great resource for anyone looking to learn new things or explore new subjects.

JSTOR (short for "Journal Storage") is a digital library that provides access to a wide range of academic journals, books, and primary sources. The content on JSTOR is primarily focused on the arts, humanities, and social sciences, and includes materials from a wide range of disciplines, including literature, history, economics, political science, and sociology.

JSTOR's collection includes millions of articles and other materials from over 2,000 academic journals, as well as books, primary source documents, and other resources. The content on JSTOR is primarily intended for academic and research purposes, and is organized into a number of different collections and subject areas to make it easier for users to find and access the materials they need.

The Nag Hammadi Library is a website that provides access to the Nag Hammadi texts, as well as a range of other resources related to Gnosticism and early Christianity. The website includes translations of the Nag Hammadi texts in a number of different languages, as well as commentary and analysis from scholars.

The Institute of Ismaili Studies is an academic organization that is dedicated to the study of the Ismaili tradition, and it provides access to a wide range of texts on esoteric Ismaili teachings. The Institute's website includes a digital library that provides access to a range of Ismaili texts, including many that deal with mysticism and spiritual practices.