Texas Hill Country Wine Trail: Clickable map with vineyard information and links. Also contains event listings.
Texas Wine and Grape Growers Association: Includes a list of members with links, a map of viticultural areas, tasting notes, and news.
Texas Wine Marketing Assistance Program: A state Department of Agriculture program offers a directory of wineries, event calendar, shipping guidelines, and a wine grape guide.
Texas Wine Trails: Lists wineries, wines, events and trails.
Texas Winegrape Network: Viticulture information resource for wine grape growers.