Pattern generator http://www.shodor.org/interactivate/activities/PatternGenerator/
Sequencer http://www.shodor.org/interactivate/activities/Sequencer/
Function Flyer http://www.shodor.org/interactivate/activities/FunctionFlyer/
Function Machine http://www.shodor.org/interactivate/activities/FunctionMachine/
Linear Function Machine http://www.shodor.org/interactivate/activities/LinearFunctMachine/
Positive Linear Function Machine http://www.shodor.org/interactivate/activities/PositiveLinearFunct/
Vertical Line Test http://www.shodor.org/interactivate/activities/VerticalLineTest