Below are links to problems which involve the Mathlets:

Amplitude and Phase: 1st Order
Amplitude and Phase: 2nd Order I
Amplitude and Phase: 2nd Order II
Complex Exponential
Complex Roots
Convolution Flip and Drag
Damped Vibration
Eulers Method
Fourier Coefficients
Linear Phase Portraits: Cursor Entry
Linear Phase Portraits: Marix Entry
Phase Lines
Poles and Vibrations
Poles and Vibrations
Solution Targets