Spanish Verb Drills where you can generate your own quizzes and learn verbs in context.
Medicial Spanish Although they don't have anything specifically for verbs yet, I'm sure they will have soon. This website is for healthcare workers who need to speak Spanish with their patients.
Spanish Verb Conjugator will allow you to conjugate Spanish verb infinitives.
100 Most Used Verbs is a list of the 100 most useful verbs to learn.