The following is courtesy of FoundingFathers.info – a wonderful resource, and well-worth your visit.
The Federalist Papers
The Federalist Papers were written and published during the years 1787 and 1788 in several New York State newspapers to persuade New York voters to ratify the proposed constitution.
Amendments to the Constitution
The Declaration of Independence
[...] addition to providing links to everything from our founding documents and votes on specific legislation as well as such things Essential Sources, data on the elections [...]
Thank you for listing all of these important documents in one easy to find place. Keep up the good work.