Below is a list of many GSP Script Tool links that you may find very useful while using Geometer's Sketchpad. The creation of a library of GSP script tools for doing constructions you might use several times is an efficient way to organize and store your work. Using a script tool to construct the Orthocenter of a triangle multiple times is a lot easier than repeating the construction of an orthocenter from scratch several times.
Orthocenter, Mid - Segment Triangle
Equilateral Triangle, given a side
Isosceles Triangle, given base and altitude
Triangle Centers (H,G,C, and I)
Triangle Centers with Euler Line
Locus of Vertex of a Fixed Angle that Subtends a Fixed Segment
Divide a Segment AB into two parts that form a golden ratio