Easy to use GUI that gives Euler angles for different rotation matrices and gives rotation matrices for different Euler angles. Also it animates the angle rotations one by one for more understanding.
I did that and more. Now gimme my five! =]
Fantastic! Very easy to use & it gets the point across beautifully.
One suggestion: test the inputs to see if the boxes are empty, then use defaults if user has not specified. This will make it a little friendlier to first-time users.
Added fixed angles, default values.