Ok, I found this list at Casinomeister:
List of Rival Casino White Labels
21 Grand Casino
Always Vegas
Bet821 Casino
Club Vegas USA
Cocoa Casino
Connect2Casino
DaVinci’s Gold
Dendera Casino
Fortune Reel
Irish Luck Casino
Lion Slots Casino
Mayan Fortune Casino
Orangegamez Casino
Pantasia Online Casino
Paradise 8 Casino
Planet23 Casino
Ricardos Casino
Rockbet Casino
Royal Apollo
Ruby Royal
Sahara Sands Casino
Simon Says Casino
Slots Jackpot Casino
Slots of Fortune
Spintime
Superior Casino
SupremePlay Casino
This is Vegas
Tradition Casino
Tropica Casino
Vegas Regal Casino
Vegas Sky Casino
VegasDays Casino