By far the best online casinos to play slots are from those powered by Microgaming software. These casinos feature 50+ slot games which cover just about every possible combination of reels, payout lines, special symbols, progressive jackpots etc to the point of spamming. The only other casinos to rival Microgaming casinos are Playtech casinos which offer a worthwhile range of innovative slot games.
Although it's progressive slot games are less popular than those from Microgaming casinos. Vegas Red offers a number of bonus slots, 8 line slots and multi spin slots which offer a worthy challenge to the Microgaming casinos.
Casinos Compared (.com) provides the low down on the best online casinos to players of US $.
Casinos Compared (.co.uk) is a UK casino guide to players of £, which includes extensive casino games guides.