- American War Library
 - Collects, preserves, and provides access to a registry of military service members.  Canadian Association of Professional Heritage Consultants (CAPHC)
- Represents the interests of professional practitioners in many related fields of heritage conservation.- Past Forward Heritage Services
- Writers and publishers focused on preserving local, oral, and social history.
- Yukon Historic Research
- Offers detailed research services on all aspects of Yukon history.
- American Civil War Research Database
- Offers a fully searchable database of people, places, and events of the United States Civil War.
- Early American Digital Library
- Rare and hard-to-find images of early America's people, historic events and maps.
- HeritEDGE Historical Enterprises, Ltd.
- Offers expertise in history consulting, research, public speaking, idea generation and exhibition curation for businesses and institutions.
- Historical Database
- Products include a CD-ROM of letters of delegates to Congress, ships' histories, and Japanese shipping losses.
- Historical Document Reproduction, Inc.
- Offers full-sized colour prints of U.S. historical documents, with an emphasis on World War II.
- History Club On-Line
- Trivia and games for individuals who enjoy writing and reading about history.
- History for Sale
- Autographs and manuscripts from every conceivable field of endeavor, signed by history's greats from past to present.
- Mackus Company
- Specializes in the acquisition and sale of historical legal documents and illuminated manuscripts, including Book of Hours, and music and biblical leaves.
- Militaryheritage.com - Home of the Discriminating General
- Reproductions, research, and consulting services spanning the period 1743 to 1856.
- Out Of The Past Programs
- Lectures on genealogy and history presented by professional genealogist, Richard L. Hooverson, a well-known author and speaker.
- Paperless Archives
- Provides access to once secret and historical documents covering presidents, past events, celebrities, organized crime, politics, military, and more.
- U.S.S. Constitution Web Site
- Selling books, CDs, videos, souvenirs, and prints.
- usflagshop.com
- U.S. Historic flags including: Grand Union, Bennington, Star Spangled Banner, Odd Star, Confederate and more.
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