First Nations Histories
Short histories of many Native American Tribes. Although the list is not yet complete, the East & Midwest portions are well covered.

History Matters
An excellent annotated guide to American history websites by the American Social History Project/Center for Media and Learning.

Michigan Historical Center

Native Web
"An international, nonprofit, educational volunteer organization dedicated disseminating information from and about indigenous nations, peoples, and organizations around the world & to foster communication between native and non-native peoples..."