Digital Images -
http://digitalgallery.nypl.org/nypldigital/index.cfm - an excellent source for thousands of primary source images, with citations

http://archives.museum.tv/login Radio and TV broadcasts. Create an ID to access all the content.  Truly worth it!

http://www.flgrvh.org Finger Lakes Genesee River Valley Heritage has images of the Erie Canal, Arts & Architecture in Rochester, and the Civil War in this region.

American History

• American Civil War Collections - http://etext.virginia.edu/civilwar/ -

  Civil War letters and diary entries include transcriptions and digital images of the manuscripts.
• American Memory Timeline -

  http://lcweb2.loc.gov/ammem/ndlpedu/features/timeline/ -

  Primary sources for seven time periods of US history 1783-1968, from the Library of Congress. 
• America's Story from America's Library - http://www.americaslibrary.gov/cgi-bin/page.cgi -
  Kid-friendly version of the Library of Congress archives site.
• Digital Classroom - http://www.archives.gov/digital_classroom/  Materials from the National Archives and Records Administration (NARA).
• Documenting the American South (DAS) -http://docsouth.unc.edu/ -

  Over 1,200 primary sources documenting the cultural history of the American South from the viewpoint of Southerners.
• Our Documents - http://www.ourdocuments.gov/ - featuring milestone documents of American history from the National Archives. Includes images of original primary source documents, lesson plans, competitions, and educational resources.
• Salem Witch Trials - http://etext.lib.virginia.edu/salem/witchcraft/ - collection of primary source materials, including court records, contemporary books, maps, images, and literary works, relating to the Salem witch trials of 1692.

World History / Oral History

From the Avalon Project - Documents in Law, History and Diplomacy from Yale Law School Lillian Goldman Law Library

• Ancient Documents from ?? - 399AD
• Medieval Documents 400AD - 1399AD
• 15th Century Documents (1400's)
• 16th Century Documents (1500's)
• 17th Century Documents (1600's)
• 18th Century Documents (1700's)
• 19th Century Documents (1800's)
• 20th Century Documents (1900's)
• 21st Century Docments (2000's)

From Forham University

• Internet Ancient History Sourcebook
• Internet Medieval Sourcebook
• Internet Modern History Sourcebook - Early Modern Europe
• Internet Modern History Sourcebook - Scientific, Political & Industrial Revolutions
• Internet Modern History Sourcebook - 19th Century
• Internet Modern History Sourcebook - War, Conflict & Progress