At one point I was going to try chain maille. Then I figured I would just stick with what I do best, which is stringing. But I still have an appreciation for chaine maille jewelry and I have a friend at work who got into it and makes really beautiful chain maille jewelry. I love the intricate designs and renaissance look of maille. I had researched some pages for tutorials and where to buy jump rings, so these are the pages that I had found for chain maille resources.
Chain Maille Ring Calculator Program - There is a free trial version, otherwise it's $14 to download the full version.
INFORMATION & TUTORIALS
Culture Jewelry - chain maille resources including an e-book, articles and tools
Chain Weavers - This site sells jump rings and offers both free and for purchase tutorials as well as kits.
M.A.I.L. Maille Artisans International League - Very comprehensive site with articles, a library of designs, forums and more.
Jump Ring Jewelry - A few free patterns for jump ring jewelry.
Jump Ring Lady - several patterns
All About Chain Maille - might be more clothing/costume related, but it's informative, plus there are some links worth checking out under the "Related Links" area.
How to Make a Byzantine Chain - how-to article
CG Maille - lots of tutorials. Check out their links page as well for links to more information and also where to buy supplies.
Making Chains - a few tutorials from About.com
Maille of the Dreamseekers - Several tutorials
Chain Maille Patterns from Dylon Whyte - tutorials, with option to purchase books by the author as well.
WHERE TO BUY - RINGS, KITS AND SUPPLIES
Blue Buddha Boutique - I believe my friend buys her rings from this company
Urban Maille - gorgeous kits
C&T Designs - supplies
The Ring Lord - supplies and tools