The Circuits v4 package contains 5 Physlets designed to solve the common AC and DC circuit problems.  In addition to the usual RC and LRC simulations,  there is an applet to plot non-linear I vs V response and an applet to plot frequency response.

Most circuit applets have a graph  that is internal to the Physlet to display characteristic curves or voltage as a function of time.  It is also possible to use a data connection to present a custom graph.