PBS
Pbs: The Vikings Secrets of Norse Ships
This PBS website describes and explains how the Vikings built and designed their ships so that they could sail long distances.
BBC
Bbc: History: Viking Weapons and Warfare
Beginning with their most important tool of warfare, their ships, this author discusses what is currently known about Viking weapons and tactics. It is easy to see why they were so successful in war. Archived.
Other
Viking Ship House Museum in Oslo
Great pictures of a Viking ship housed in a museum in Oslo, Norway. Incredible work of art!