GeoGebra

GeoGebra is a powerful tool developed by GeoGebra Team and it is used for learning Mathematics by combining Geometry, Algebra and Calculus.

It has a nice GUI that allows the users to interact with buttons rather than text commands. The intuitive menu provides the users with a better understanding of both basic and advanced Mathematics. It comes with accurate drawing tools for various shapes and items; what makes this application different from other similar products is the fact that it provides the tools for calculating complex equations. One of the key features of this feature-rich program is that it comes with explanatory equations for each of the shapes or items that are being drawn by the users.

The users are allowed to customize their settings to fit their needs, and the intuitive menu helps the beginners to find their way around the program. The application comes with basic tools for editing drawings, but it also provides more complex tools which gives Mathematics a better understanding.
All in all, it is important to say that GeoGebra is a free and complete tool for learning and exploring Mathematics, combining Geometry, Algebra and Calculus in a single application.