Many online casino users do not realize that the casino software which is being used at the online casino is not actually written by the casino themselves but by a third party that specialises in writing software; even the graphics for the wonderful slot games are all created by the software company and not the online casino. You may have noticed that several online casinos seem to have the same selection of casino games and where this happens you can be sure that the casino software is common to all. This can of course have a distinct advantage as it is this exactly which enables the huge progressive jackpots to accumulate as they are being contributed to by various online casinos. In truth it probably does not matter too much what casino software your chosen online casino is using as long as you are happy with the graphics, music and choice of games and of course it matters that your chosen casino has all the necessary certifications in place to ensure fair gaming. There are a couple of major players in the casino software business and in no particular order Microgaming is used by Spin Palace Casino as well as Ladbrokes and is probably best known for the range of progressive jackpot slots such as “King Cashalot”. Another major player is Playtech who have a joint venture with William Hill Online and there are still rumours of a complete takeover but that might upset some of the other users such as Bet365 or BetFred who use the same software. Paddy Power have also recently changed their casino software supplier and launched it as a new casino which it in effect is. It is also not unusual for online casinos to use more than one casino software supplier for different areas of the casino site so you may find similar slots on two casino sites but completely different casino games.