Groupon.sg

Previously known as Beeconomic, they started in May 2012 by two Singaporean entrepreneurs before being bought by groupon, groupon.sg is the biggest groupon site in Singapore. They have deals that last 1-2 days in 3 main categories, Visa Exclusive Deals, Shopping and Travel. The site also has a referral program and an account area where you can keep track  of all your referrals and deals bought.