University of Georgia
University of Georgia: Extended Concurrencies of a Triangle
This site is an extended activity on point concurrency in triangles. The page goes through an exploration with the Napoleon Point and the Fermat Point. The site requires the use of GSP.
Texas Instruments
Texas Instruments: Bring Geometry to Life
In this activity, learners use the Geometer's Sketchpad application to construct Euler's Line, Pythagorean Proof, and Fermat's point. They also investigate the concept of perimeter.