Geopad is dynamic geometry drawing tool. It has a lot of tools to simplify the process of drawing complicated geometry figures. Olympiad geometric constructions has been specially kept in mind while adding this rich collection of useful features that include:
Over 50 different operations.
Saving files in .gpd extensions.
Saving problems along with diagrams in a single file.
Navigation, movement, zoom in/out, rotation a lot more on-screen gestures.
Analyzing a diagram for important properties.
Lots of lines, circles, angles, triangle operations.
Easily draw common triangle centers just by selecting the triangle.
Get pgf code directly from the diagram and save it in a .tex file.