White Labs is a company which makes and sells yeast for homebrewers as well as breweries. They have dozens of yeast strains available:
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ALE YEAST
WLP001 California Ale Yeast
WLP002 English Ale Yeast
WLP004 Irish Ale Yeast
WLP005 British Ale Yeast
WLP007 Dry English Ale Yeast
WLP008 East Coast Ale Yeast
WLP009 Australian Ale Yeast
WLP011 European Ale Yeast
WLP013 London Ale Yeast
WLP022 Essex Ale Yeast
WLP023 Burton Ale Yeast
WLP026 Premium Bitter Ale Yeast
WLP028 Edinburgh Scottish Ale Yeast
WLP029 German Ale/ Kölsch Yeast
WLP036 Dusseldorf Alt Yeast
WLP039 Nottingham Ale Yeast
WLP041 Pacific Ale Yeast
WLP051 California Ale V Yeast
WLP060 American Ale Yeast Blend
WLP099 Super High Gravity Ale Yeast
SPECIALTY/BELGIAN YEAST
WLP300 Hefeweizen Ale Yeast
WLP320 American Hefeweizen Ale Yeast
WLP351 Bavarian Weizen Yeast
WLP380 Hefeweizen IV Ale Yeast
WLP400 Belgian Wit Ale Yeast
WLP410 Belgian Wit II Ale Yeast
WLP500 Trappist Ale Yeast
WLP510 Belgian Bastogne Ale Yeast
WLP515 Antwerp Ale Yeast
WLP530 Abbey Ale Yeast
WLP540 Abbey IV Ale Yeast
WLP550 Belgian Ale Yeast
WLP565 Belgian Saison I Yeast
WLP566 Belgian Saison II Yeast
WLP570 Belgian Golden Ale Yeast
WLP575 Belgian Style Ale Yeast Blend
WINE/MEAD/CIDER YEAST
WLP715 Champagne Yeast
WLP718 Avize Wine Yeast
WLP720 Sweet Mead/Wine Yeast
WLP727 Steinberg-Geisenheim Wine Yeast
WLP730 Chardonnay White Wine Yeast
WLP735 French White Wine Yeast
WLP740 Merlot Red Wine Yeast
WLP749 Assmanshausen Wine Yeast
WLP750 French Red Wine Yeast
WLP760 Cabernet Red Wine Yeast
WLP770 Suremain Burgundy Wine Yeast
WLP775 English Cider Yeast
LAGER YEAST
WLP800 Pilsner Lager Yeast
WLP802 Czech Budejovice Lager Yeast
WLP810 San Francisco Lager Yeast
WLP820 Oktoberfest/Märzen Lager Yeast
WLP830 German Lager Yeast
WLP833 German Bock Lager Yeast
WLP838 Southern German Lager Yeast
WLP840 American Lager Yeast
WLP885 Zurich Lager Yeast
WLP940 Mexican Lager Yeast