The following databases contain a specific function to locate clinical trial information. Keep in mind that this list is constantly being updated. Database interfaces undergo changes and, sometimes, it takes time for us (librarians and patrons) to realize the database company has added a clinical trial function. Again, just because there is no function to limit the database to clinical trials, does not mean that there are no evidence-based articles located within the database.
Below are links to websites that contain clinical trial information.