http://www.savills.com.sg/research/resi ... earch.aspx
Their quarterly research reports are professional-level research, and they're non-sub/free. A good way of keeping up to date on longer term trends, incl how it ties into government policy like ABSD, visa quotas, and so on. That is my go-to source when I'm negotiating a renewal of a tenancy agreement, as it means I go into any negotiation completely informed, and able to 'bat out the way' any self-interested bull$ from the agents involved.
I've also subscribed to their country-level e-mails which are in part news round-ups from the local press and cover all
property sectors. Those might be each two weeks or monthly... I forget now. Only about a page long, takes a minute to skim. This gives an overview of new developments, malls that are dying a death, en-bloc deals, transport infrastructure and so on.
The two together give a feel that I have a reasonably informed overview on what is going on. The latter e-mail can also be useful; for example it's where I picked up that Pasar Bella ('farmers market') are opening a branch in Suntec, the pretty excruciating slow demise of Clarke Quay, and so on.