The American Immigration Home Page
Founded as a 10th grade history project, this site examines the motivations for immigration to the United States from 1607 to the present, the reception immigrants received, the impact of immigration on America, and other relevant factors by time period. This site is supported by the Academy for the Advancement of Science and Technology.
http://www.bergen.org/AAST/Projects/Immigration/index.html
Histories of the First Nations
This project by historian Lee Sultzman contains 24 tribal histories that can be accessed through an alphabetical list. It includes discussions of language, government and culture. The tribal histories are cross-referenced to each other, where appropriate, and there are hyperlinks to other related resources as well.
http://www.dickshovel.com/Compacts.html