is the best site I have visited that has nickel slot machine info.

The best listing of nickel slots and casinos with nickel slot machines that I have found is

Ranked Online Casinos lists tons of casinos offering the best video slots, free spin bonus slots, and other games where you can play for pennies, nickels, or even high stakes.

I can give you the name of a casino that offers slots that you can play a penny, two cents, a nickle, or a dime on slots that other casinos only offer as quarter slots.

It is Spin Palace Casino. They are my favorite of all times. Check them out here.