Paul Falstad's Graphical Display of Fields: Electric Potential Display I , II
This is the application we played with in class to develop our understanding of fields. Things are more abstract when we talk about electric potential. Both of the simulations above give you different perspectives on this critical concept but don't forget our classroom explorations of this material!
Demigod Rhett Allain: Electric Eels and Electric Potential, Easy Electric Potential
Rhett explores a sign at the aquarium that confuses some concepts connected to Electric Potential and Energy. We will come back and revisit this when we are talking about circuits.The second post is about learning physics and is only incidentally related to the electric potential but it is still a valuable (and short) post.
Demigod Walter Lewin on Electric Potentials
Save this for last of course and don't spend a lot of time here unless you really have it.