Roleplaying Resources

Campaigns

Running a Game

Realism

Running a Better Medieval Campaign

Life in medieval times

Farming

Adventuring in Cold Weather

British and Sweedish Measurement Units

Taxes

What did houses look like in the middle ages?

What did people do in a medieval city?

Medieval Demographics: Medieval Demographics Made Easy, an article by S. John Ross.

A Boke of Gode Cookery: James Matterer's collection of medieval recipes which he has translated and adapted for the modern cook.

Blue Moon Aurora: This site has some well-constructed adventures, advice on duet roleplaying, and some roleplaying tips.

The Medieval Technology Pages.

Ancient and Medieval Law.

Combat

Misc

The Campaign Builders' Guild Useful forums for campaign building, with a play-by-post section.

The FidoNet AD&D Compendium Version 2.1: A collection of classes, monsters, spells, magic items and whatnot else for 2nd edition, created by the FidoNet community.

Encyclopedia Mythica, a thorough reference on real-world myths and legends. This is very useful for giving your campaign world a unique feel. Don't like the standard D&D goblins or kobolds? Look them up in the encyclopedia and see what you find. Wikipedia is also a good reference for this.