AP World History: Primary Sources

From the Library of Congress.
Search America's historic newspaper pages from 1836-1922 or use the U.S. Newspaper Directory to find information about American newspapers published between 1690-present.

From their website:
The Internet Archive is a non-profit that was founded to build an Internet library. Its purposes include offering permanent access for researchers, historians, scholars, people with disabilities, and the general public to historical collections that exist in digital format.

Founded in 1996 and located in San Francisco, the Archive has been receiving data donations from Alexa Internet and others. In late 1999, the organization started to grow to include more well-rounded collections. Now the Internet Archive includes: texts, audio, moving images, and software as well as archived web pages in our collections

Musical scores in the public domain

Guide to art history resources on the web

Project Gutenberg is a library of over 60,000 free eBooks

A collection of public domain and copy-permitted historical texts presented cleanly (without advertising or excessive layout) for educational use from Fordham University

Cross-disciplinary source spanning the 20th century. Each volume in the set includes full or excerpted primary sources representing the seminal issues, themes, movements and events from a decade. Includes oral histories, songs, speeches, advertisements, TV, play and movie scripts, letters, laws, legal decisions, newspaper articles, cartoons, recipes, and more.