Links

Maliewerksites (English):
MAIL - Patterns, articles, forum, links. It's an outdated site, but definitely worth it.
Zlosk's AR table - More about size ratios (ARs)
Chainmaillers - A newer site with information and patterns.

Here are a few links to other quirky suppliers:

Atelier Zilverlinde Handmade silver jewelry, closely following authentic medieval designs.
Korenhof Maille Maille made to measure, also for larger pieces
Subcultures “Games, tees and wheee!” Games, books, clothing and designer toys.
Jack of Dice Dice, role playing games and accessories
Numinous Manufactory : Handmade jewelry in various techniques, including chainmail