Here's my applet collection:

• Transformations - Manipulate the transformations on a quadratic function
• Circumcircle - Method of construction for the circumcircle of a Triangle.
• Derivatives - Display a function and trace the first derivative of it.

And this is the Final applet:

• Pascal's Triangle - Explore the first few rows of Pascal's Triangle.
• Pascal's Line - Explore Pascal's Mystic Hexagon!