Physlets: scriptable Java applets from Wolfgang Christian at Davidson College
Animator4 (versatile tool for animating almost anything imaginable that moves)
DataGraph4 (graph almost anything)
Ripple4 (a virtual ripple tank)
Optics4 (a virtual optical bench)
ScriptListener4 (respond to changes in an object's properties)
WebAssign™: individualized question creation/delivery from Larry Martin at North Park University
multiple-choice questions
numerical questions
essay questions