Some of the sites we like at slot-games.org are these:

Gambling Problem & Addiction of Slots.

GamblingHelpOnline.org.au is one of the first places for Australian players to contact if you need help, and you have become addicted to slots , you can even get online help right away.

Cnwl.nhs.uk is UK’s National Problem Gambling Clinic, and the place to start if you are from UK and have a slots addiction, we know several that have used them with success.

GamblingCommission.gov.uk is the place to contact if you have problems with a UK licensed online  casino, it also has a list of the casinos that are fully licensed.

http://www.100bestmobilecasinos.com this site only list the fully legal and licensed mobile casinos, it’s always better to play at licensed casinos as they have strict rules and standards they must follow to keep the mobile casino licensee.

https://en.wikipedia.org/wiki/Slot_machine is also a good place to get more info about slot machines.