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

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

Index character descriptions of different varietals. Personifies grapes into different personality types with illustrations.

Information about varieties suited for cool climates.

Searchable glossary provides information about hundreds of types of grapes. Includes information on classic varietals, crosses and hybrids.

List and description of the 80 varietals of most interest to the United States market.

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

Listing and description of grape varietals grown by country/region. Wines made by each variety and the areas in which it is typically grown in each region is also discussed.

Focuses on Sonoma County Zinfandel. Includes links to information about the grape, tasting notes, and a list of wineries.

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.