The group I participate in is Medieval Re-enactors then you can from there find local information for your area. We are pretty much all over the world. I think the best and coolest information about Norse and Anglo Saxon technology and culture is on the Regium Aglorum page. They are a very focused group in the UK and they have very informative and attractive web.
Offered by Gus.
This topic is covered by "Medieval Societies". Every major city has one. Quite often during community events they have their own stands. They demonstrate cooking, blacksmithing, archery etc. and they do it the way it was done in the past. Check your local city or town. This could save us some work.
Offered by Chris.