Saxons and Vikings is a set of four page simple rules for Dark Ages battles
The Command Tent has a nice post on how to scratch build a viking A frame house. I’m going to build a couple of these for my Viking/Saxon/Norman games.
The Man Cave has a couple of printable Viking flags.
Viking Raid is a set of free wargames rules for carrying out a competitive Viking raid. The set uses playing cards as an integral mechanism.
The Veni Vidi Vici site has some great photos of Dark Ages miniatures. I’m painting a variety of Dark Ages armies and always like to reference other peoples’ painting projects. These are really good.