A great resource to find conceptual connections between seemingly diverse philosophers. I find it to be an excellent resource to stimulate my own desire to learn more about particular philosophers. However, please note that it only covers Western philosophers.
The standard encyclopedia of philosophy. It is updated frequently by noted scholars, and full of a great deal of scholarship and further references. However, it can be both highly challenging reading material and is approached from contemporary scholars in what we call the “Analytic” tradition.