Probably the least thought about thing when playing at an online casino is what software you are using and in truth as long as you are happy with the game and the graphics that you are playing it is probably not that important as long as you are using a reputable casino such as the ones we recommend. Casino software is a specialised field and there are 4 or 5 companies that specialise in the development and who then market the software to the casino operators. Only by using a reputable casino software that is independently audited for fair play and security can you be sure that you are playing an honest game; as far as this is concerned beware the smaller operators who develop their own software which usually has limited game options. Not all online casinos state which casino software they are using but you can usually find out with a bit of digging. The best known are Microgaming casino and Playtech casino; Microgaming is used by such well known names as Ladbrokes who use it for both online casino and online poker applications whilst Playtech is used by Bet365, BetFred and William Hill making it also a very respectable software provider. Other well known names include Wagerworks casino whose biggest user is probably Paddy Power but 888 casino use the slots offering from the same provider. Cryptologic is an Irish developer and has a very good reputation and finally of the big five is Chartwell which was originally registered in Canada but now has employees in several countries and is used by Bwin. Stick with the big players and you will not go far wrong with casino software.