Clinical Trials registers and databases of ongoing research
CentreWatch (Clinical trials listing service)
http://www.centrewatch.com/main.html
ClinicalTrials.gov (US trials register - mainly funded by NIH)
CRISP (Computer Retrieval of Information on Scientific Projects funded by NIH and other US government agencies)
http://www.nih.gov/health/trials/index.htm
mRCT (The metaRegister of controlled trials (free registration on site))
http://www.controlled-trials.com/
NIDRR (Projects funded by National Institute on Disability and Rehabilitation Research)
NRR (National Health Service National Research Register (UK))
http://www.update-software.com.NRR.htm
PEDro (The Physiotherapy Evidence Database of trials and systematic reviews)