American Memory from the Library of Congress
- Offers materials relating to the history and culture of the United States. Includes topics such as history, geography, and economics.
- http://memory.loc.gov/ammem/

History Buff - Discovery.com
- Historical reference of press coverage from the 16th to the 20th century. Includes newspaper articles, audio files, and video clips.
- http://www.historybuff.com/

Lost and Found Sound
- National Public Radio series features sound recordings from famous people and ordinary people that capture the history of the late-19th and 20th centuries.
- http://www.npr.org/programs/lnfsound/

The Words that Changed the World
- Collection of excerpts drawn from the most famous broadcasts and recordings of the twentieth century. All are available in RealAudio format and include background information. From The History Channel.
- http://www.historychannel.com/speeches/speeches.html

History and Politics Out Loud
- A searchable archive of politically significant audio materials.
- http://www.hpol.org/