De Long's Wine Grape Varietal Table Offers information about 144 varieties organized in an interactive table. Also sells a print version of the table.

Enjoying Viognier Features news and information about Viognier, a wine of the month, and a searchable database of retailers and prices.

Got Tannins? Wine Blog featuring unique interviews. We take the intimidation out of wine.

P.S. I Love You Industry organization dedicated to promoting the Petite Sirah grape. Includes a history of Petite Sirah, articles, a list of members, and recipes of suggested food pairings.

Pinotage Association Association promoting South Africa's Pinotage. Contains a history of the grape, winemaking information, and a producer list.

PinotFile A Free Weekly Online Newsletter Exclusively Devoted to Pinot Noir.

Riesling Wine of Canada dedicated to collection information on Riesling wine, especially Canadian Rieslins. Includes history, descriptions, reviews and more.

TasteTour.com A series of wine guide booklets and wine chart posters on the six major wine varietals of the world.

Wine and Juice Grape Varieties Information about varieties suited for cool climates.

Zinfandel Advocates and Producers Non-profit organization dedicated to promoting Zinfandel. Contains information about the grape, membership details, and a list of events.

ZOW - Zinfandel on the Web Contains tasting notes and links to Zinfandel-producing wineries.