Here are a list of offers available for my friends in the UK.
Any problems or errors please let me know and I'll try to update ASAP.
I found Tembo recommended on a couple of money websites. I like that they show your daily interest which is applied monthly. You can add up to 20k each year.
Reward: £10 - £100 credit.
(Limited to 5 referrals per month)
(Requires opening a lifetime ISA or Cash ISA and depositing £500 within 30 days.)
This I'm new too. I'll update when I know more. They offer a stock and shares ISA where they also pay interests on uninvested cash. So the best of both worlds. You can add up to 20k each year and profits from stock and / or interest isn't taxed.