Here is a list of some script tools for the Geometer's Sketchpad. To use this on your own home computer please save them to the Tool Folder in the Sketchpad directory. The definitions can be found on InterMath's online dictionary
Orthocenter, Mid-segment triangle.
Pedal Triangle for any point in the plane
Center of Nine point circle
Nine Point Circle
Trisecting a line segment
Equilateral triangle, given a side
Square, given a side
Isosceles triangle, given base and altitude
Triangle Centers (H, G, C, and I)
Triangle Centers with Euler Line
Divide a segment AB into two parts that form a golden ratio.
Hexagon, given a side.
Octagon, given a side.