American CPE (Visit this link) popular
American CPE provides a list of self study CPE courses for CPA's and other financial professionals. Included is a list of state boards and organizations that accept American CPE courses towards fulfillment of Continuing Professional Education requirements. American CPE provides unlimited testing for one year from the date of purchase for CPE courses.
You can also find more listings from this category, here: Continuing Professional Education, CPE For CPAs