Axes were very common weapons throughout the medieval period and quite geographically dispersed. The reasoning is pretty simple: Iron is rare and expensive. To create an axe you need a relatively small amount of iron and then a large amount of relatively cheap and abundant wood. It thus has a significant amount of the utility of a sword (ability to cut/chop/harm) at a fraction of the cost. Spears were popular for similar reasons, as well as increased reach, and were especially useful when closely supported. Germanic peoples have a long history of using axes, and this applied to Northern Germanic peoples as well (note: "viking" is a job title, not a particular group of people). Northern Germanic peasants would have more likely used a spear.

Basically - in any medieval time or place, the most common hand weapon is probably going to be the spear, followed by axes, knives, maces, and clubs, followed by swords. This applies to Northern Germans during the "viking age" as well, but the actual raiders ("Vikings" proper") would have had more swords and axes and fewer spears.

Northern Germans did have a wide array of weaponry. They had swords, which would be a mark of status and very expensive weaponry. The Saxons get their name from a knife, the seax, which was commonly used as well. As mentioned above, they had spears and axes.

TL;DR: Yes, Vikings liked axes. They were cheaper than swords with much of the utility. Northern German peoples as a whole used a wide array of weapons, including spears, swords, knives, daggers, and axes.