Artifacts
The Peabody Museum of Archaeology and Ethnology is steward to one of the oldest and largest collections of cultural objects in the Western Hemisphere. Today, the Peabody houses more than 1.2 million individual objects, 500,000 photographic images, and substantial archival records.
You can browse a portion of the collections online.
NativeTech : Native American Technology and Art
Restoring Ancestral Connections
Web List: Museums with Native American Collections
Native American Indian Museums & Heritage Centers (Some have web exhibits)