There are lots of data resources out there, but much about patterns and information about Singapore because simply put not important enough to warrant business investing time and effort to collate. sanitize and analyze the data. The government has put in effort through https://data.gov.sg . Its far from perfect but there is significant amounts of data which can be leveraged to build products if not parts of product.
However.., I do feel the organization and presentation of the data can be significantly improved. While there are search functionality, there lacks a listing. There is however an API call where you can list the data. Will be working on this further. But right now its now live at https://serendipitysingapore.com/wp/sgdataproject/