Locally in St Louis I have purchased:
Schlafly (all varieties)
Sam Adams Boston Lager
Sam Adams Boston Ale
Blue Moon
Skinny Dip
Fat Tire
Boulevard Wheat
Sierra Nevada Pale Ale
Anchor Steam Beer
Pyramid Hefe
Here's a couple things I found online that at least show the breweries use 1/6 barrels. Whether we can all get them in our areas is another matter.
From
Bruno's Liquor:
Quarter & 1/6 Barrels cost
Berghoff Dark $55
Berghoff Red $55
Berghoff Lager $55
Budweiser $48
Bud Light $48
Bud Select $48
Busch $41
Busch Light $41
Capital Island Wheat 1/6 barrel* $61
Capital Autumnal Fire 1/6 barrel* $76
Capital Blonde Dopplebock 1/6 barrel* $76
Capital Fest Seasonal 1/6 barrel* $61
Capital Maibock 1/6 barrel* $61
Capital Octoberfest 1/6 barrel* $61
Capital Winter Skal 1/6 barrel* $76
Capital Wisconsin Amber 1/4 barrel* $82
Capital Wisconsin Amber 1/6 barrel* $61
Coors Light $45
Fosters 1/6 barrel $47
Goose Island Seasonal 1/6 barrel* $52
Kronenbourg 1/6 bbl $62
Lakefront Bock* $63
Lakefront Cream City Pale Ale* $63
Lakefront Eastside Dark* $63
Lakefront OOctoberfest* $63
Lakefront Organic ESB* $63
Lakefront Pumpkin (seasonal)* $63
Lakefront Riverwest Stein* $63
Lakefront Snake Chaser* $63
Lakefront White* $63
Leinenkugel Lager $48
Leinenkugel Honey Weiss $65
Leinenkugel Red $65
Leinenkugel Berry Weiss 1/6 bbl $47
Leinenkugel Creamy Dark $65
Leinenkugel Big Butt Dopplebock 1/6 bbl $47
Michelob $48
Michelob Light $48
Michelob Amber Bock 1/6 barrel $32
Michelob Ultra 1/6 barrel $32
Miller Lite $48
Miller Genuine Draft $48
Miller High Life $48
New Glarus $82
Pabst $40
Pilsner Urquell $87
Point Special* $39
Rolling Rock $49
Sam Adam's Boston Lager $66
Sam Adam's White Ale 1/6 bbl $56
Spaten Optimator 30 ltr $95
Spaten Franziskaner Hefe-weiss 30 ltr $95
Spaten Franziskaner Hefe-weiss Dark 30 ltr $95
Sprecher Amber $60
Sprecher Black Bavarian* $60
Sprecher Hefe Weiss* $60
Sprecher Mai Bock* $60
Sprecher Micro Light $60
Sprecher Octoberfest (seasonal)* $60
Sprecher Pub Ale* $60
Sprecher Winter Ale (seasonal)* $60
Sprecher Root Beer NA $29
Tyranena Bitter Woman 1/6 barrel $50
Tyranena Black Hawk Porter 1/6 barrel $50
Tyranena Headless Man Amber 1/6 barrel $50
Widmer Bros Hefe-Weizen 1/6 barrel $59
From BevMO in NoCal look at beers available after you choose a store such as
San Jose:
Gordon Biersch (most bottled types)
El Toro Poppy Amber (used to be Poppy Jasper)
North Coast Red Seal Ale
Lost Coast Great White 5 Gal K
Speakeasy Big Daddy
Alaskan Amber
Wyder's Pear Cider (I know, not beer. Too bad. I like it)
Tied House (most bottled types)
Anderson Valley Hop Ottin' I.P.A.
Firehouse Pale Ale
There are more if you change to SoCal location but you get the idea. There was a list somewhere online which described the sizes available by brewery but it seems to have disappeared.