Clinical Trials OncoNavigator (BCT)
non-profit service that encourages individuals affected by breast cancer to consider clinical trials as a routine option for care

Cancer Trials Support Unit (CTSU)
service of National Cancer Institute (NCI), USA;
project for the support of a national network of physicians to participate in NCI-sponsored Phase III cancer treatment trials

clinical trials information: news, analysis, study grants, career opportunities, and trial listings

Clinical Trials
service of National Cancer Institute (NCI), USA;
contains a registry of 8,000+ open and 19,000+ closed cancer clinical trials from around the world
service of National Institutes of Health (NIH), USA;
registry and results database of federally and privately supported clinical trials conducted in the United States and around the world

Clinical Trials and Noteworthy Treatments for Brain Tumors
service of Musella Foundation for BrainTumor Research and Information, USA

Current Controlled Trials (CCT)
service of Springer Science+Business Media, UK;
allows users to search, register and share information about randomised controlled trials