Microgaming Slots

Some of their releases:

Georgie Porgie Slot
In the nursery rhyme, Georgie Porgie was known for his love of kissing the girls. Watch out for Georgie Porgie as he could net you a big win if he appears on the reels.
Georgie is the wild symbol and he also multiplies all wins by 5x.
That goes up to 25x when you get a Georgie Porgie symbol uring the Free Spins round. With a jackpot of 375,000 coins.

Dolphin Quest

Dolphin Quest is a 5×4 reel, 50 payline slot, where you can bet up to a maximum of 250 coins per spin. It has an undersea theme (obviously)- watch out for hermit crabs, turtles, rays, sea horses and dolphins, of course. The Golden Dolphins symbol is the scatter and if you land this on the middle 3 reels, you get at least one spin with a 150,000 jackpot waiting to be grabbed.
In the base game, the jackpot is set at a healthy 12,500 coins and there are Stacked Wilds and Multiple Wilds as well.

Wild Cash Slot
The Wild Catch slot is a 5-reel slot with 243 paylines. The big story here is the Free Games Feature, which you get into by landing 3, 4 or 5 Angler Scatter symbols on any of the reels. Once triggered, all wild wins are given a multiplier of one. You get 10, 15 or 20 free spins, depending on how many Angler Scatters you get), and if you then get another Wild Win your multiplier heads up to a maximum of 10x your winnings!
The jackpot is 5,000 coins in the base game, and 50,000 coins in the free spins round.

The Marlin is Wild: you win 5 free spins for starters, with an extra free spin handed out for any more Wild Feature icons you land.
Both the Wild Feature and Scatter Features can re-trigger.