Every bank offers credit cards with different interest rates. I use a credit card from POSB bank that provides various discounts and privileges on shopping, dining and traveling among other things. I suggest that you do some research on different cards' benefits and pick the one that's most suitable for you.
Hi, I use Maybank Family & Friends Platinum MasterCard as it offers me 5% rebates at NTUC, Watson, Toys R U, Popular Bookstores, etc. and I also get 0.3% cash rebates on all other purchases.
I personally prefer Citibank Dividend Card which lets me enjoy cash back on groceries, pharmacies and petrol. A good generic card for many dufferent uses.