We had put together some useful links and 3rd party sites that may be helpful for you.
Academy of Medicine Singapore (http://ams.edu.sg/)
Agency for Integrated Care (http://www.aic.sg/)
> Primary Care Pages (http://www.primarycarepages.sg/)
> Silver Pages (http://www.aic.sg/silverpages/)
College of Family Physicians Singapore (http://www.cfps.org.sg/)
Duke-NUS Graduate Medical School (http://www.duke-nus.edu.sg/)
Hobbit @ Facebook (https://www.facebook.com/hobbit.sma)
Lee Kong Chian School of Medicine (http://www.lkcmedicine.ntu.edu.sg/Pages/index.aspx)
Ministry of Health (http://www.moh.gov.sg)
MOH Holdings (http://www.mohh.com.sg/)
NUS Medical Society (http://medsoc.tumblr.com/)
NUS Yong Loo Lin School of Medicine (http://medicine.nus.edu.sg/corporate/default.aspx)
Singapore Medical Council (http://www.healthprofessionals.gov.sg)