In my opinion, the place of the leader of the manufacturer best slots for online casino is divided by two companies: Microgaming and Cryptologic (For example - InterCasino). And in general, I would place manufacturers video online slots in such order:

   1. Microgaming
   2. Cryptologic
   3. Playtech
   4. RTG
   5. Cassava
   6. Boss Media

At top of an on-line slot-installed for a long time also has strongly located Microgaming with more than one hundred versions of slot machines. Then follows Cryptologic, received rights of use in the slot brands «Marvel Comics», such as «X-Men», «Blade», «DareDevil» and others. Company Playtech offering to players very colourful, and rather original slot-automatic machines closes a three of leaders. The unique lack of automatic machines Playtech - them is not enough, somewhere about fifty versions.

So, lets describe best worlwide online casinos who offering best slot machines.