Selecting a suitable wine yeast strain for fermenting grape juice should take into consideration the varietal, intended wine style, and fermentation environment. Here are lists of the widely available home winemaking yeast strains from Lallemand (Lalvin), Lesaffre (Red Star), White Labs, and Wyeast Laboratories. You will also find a comprehensive list of other Lallemand yeasts used in commercial winemaking; these are usually sold in larger packages for commercial applications. Or you can go directly to a list with yeast strain recommendations for an intended style of wine.