Geometer's Sketchpad Sketches
Polar Graphing
Trigonometry Tracers
downloads/sketches/0_Early Bird/Trigonometry/Law of Cosines.gsp
Proofs
ceva1.gsp Proof pq = R^2.gsp
SineGraph.gsp
Pacman.gsp
Sketch Gallery: http://mathforum.org/dynamic/java_gsp/DR2Gallery.html