HathiTrust is a not-for-profit collaborative of academic and research libraries preserving 17+ million digitized items.

Free audiobooks of books in the public domain read by volunteers.

Open Library is an initiative of the Internet Archive building a digital library of Internet sites and other cultural artifacts in digital form.

Project Gutenberg is a volunteer effort to digitize and archive cultural works, and to "encourage the creation and distribution of eBooks."

Digital collections of primary source materials from throughout the Spanish-speaking world.

Collection of electronic texts and links to texts originally written in or about the Americas from 1492 to approximately 1820.

Shakespeare's complete plays, sonnets, and poems.

Comprehensive lists with links to full text of historical works from Africa, East Asia, India, Islam, Judaism, and more. From Fordham University.

Collections of Greek, Roman, Arabic, Germanic, Renaissance, American, and Italian texts and matierals.

Primary sources from China, Japan, Vietnam, and Korea.