After doing some research about medieval ships, I saw that, in the Viking Age, the scandinavians had naval superiority over their enemies. The Knarr and the Drakkar allowed them to go further into the Atlantic sea, even reaching the Americas. Even after the Viking Age, their ships were among the best in Europe. However, other countries must have had their own ships in this period (11th century). The franks, the saxons, the germans, italians, asturians surely had ships, but while I was doing research about them I couldn't find any good information. Do we know other ships designs used in the 11th century in western Europe? Are they adaptations of the Scandinavians?
FWIW the Vikings didn't have an unrivaled naval supremacy: the Anglo-Saxons won a number of maritime engagements against Danish fleets in the ninth and tenth centuries. Indeed, Edgar 'the Peaceful' earned his moniker in part because of the intensity with which he pursued the development of the English navy and its commensurate success in controlling the English coasts.
There was considerable maritime trade between the Anglo-Saxon kingdoms and continental Europe in the seventh and eighth centuries, which then resumed following disruption by the Danes in the late 9th and in the 10th, and then in the 10th century between west coast ports and Hiberno-Norse settlements in Ireland. Unfortunately we have almost no examples of Anglo-Saxon ships beyond that in the Sutton Hoo burial, so it's hard to tell the extent to which this represented a 'standard' English vessel, especially after the seventh century, but using that as a basis, Anglo-Saxon vessels were not widely dissimilar from Scandinavian long ships, which makes sense given both their origins and their uses.