Google Book Search - By default the link I've provided searchs for and provides full text 19th century documents (all free). If you are interested in history and you have some key words you want to search for this is an outstanding resource.
Audio Books - This website offers free, downloadable audio books. Just enter the authors name or book title in the search.
The Constitutional Convention - Daily Time Line Summary with Links to Text
http://www.gutenberg.org/ - Free Ebooks
http://www.fullbooks.com/ - Free Ebooks
http://www.lonang.com/exlibris/library.htm - Writings in natural law
http://www.nlnrac.org/archive/topic_and_subtopic - Natural Law, Natural Rights and American Constitutionalism. Classical to Modern
http://memory.loc.gov/ammem/index.html - Library of Congress
http://www.fed-soc.org/ - The Federalist Society for Law and Public Policy Studies
http://www.1828-dictionary.com/ - The earliest usable dictionary I have been able to find online.
http://www.google.com.au/ - Yes, Google. You will be amazed at what you can find by using Google, Australia that you can't locate using Google.us
http://www.loc.gov/rr/news/oltitles.html - Newspaper Archives/Indexes - U.S./International
http://www.timepage.org/spl/13colony.html - The history of the original 13 colonies (in brief) up to ratification of the USC. Constitutions' of the original 13 States.
(1774-1789) Journals of the Continental Congress - Letters of Delegates - Elliot's Debates -Farrand's Records
(1777) The Articles of Confederation - Agreed to by Congress November 15, 1777; ratified and in force, March 1, 1781
(1787) The Records of the Federal Convention of 1787, 3vols. - The Farrand editon is considered to be the most complete.
(1788) Constitution of the United States - Original Constitution. The best E-version I have found. All changes to the original are in hyper-text taking you to the Amendment that altered it.
And some people wonder why the country is in its present circumstances. Nothing is going to change if childrens minds continue to be filled with pc, socialist, revisionist, govt school bs.
The Unwritten Constitution of the United States