Booongo

You get:
300% deposit bonus up to $15,000 + 50 free spins

You get:
270% deposit bonus up to $20,000

You get:
100% deposit bonus up to 500 EUR
Daily Giveaways & Cashback, and if you manage to join their VIP Club, you can expect to get even more lucrative bonuses

You get:
Exclusive bonuses by joining their VIP Club

You get:

$0.02 BTC No Deposit Bonus + 150% deposit bonus up to $1,050

You get:
300 Wager-free Bonus Spins

You get:
100% deposit bonus up to 5BTC and 100 Free Spins

You get:
A free Affiliate Chest with up to 80,000 Coins(~$50 USD)