The Webtender Great site with tonnes of recipes and other resources. This was the first site I was aware of, of this genre.

Drinksmixer Nice site with lots of info. Thousands of cocktails and everything you'll ever need to know to pretend to be a bartender.

Dirty Sue Dirty Martini Mix - The official site for premixed dirty martini mix in a bottle.

Olive-it Your one stop shop for all your olive procurement needs.

Martini Art Features martini glasses, cocktail shakers, martini barware, original martini art, unique martini recipes, and martini related gifts. A one stop destination for everything related to martini cocktails.