Maple

Maple is a powerful symbolic and numeric computation program. It provides both 2D and 3D graphics, and can differentiate, integrate, and solve equations, as well as manipulate matrices and perform a host of other mathematical operations.

Maple includes its own built-in online help, which you may access by left-clicking on the Help button, located in the upper-right corner of the main Maple window. For help on a particular topic, enter ? followed by the topic.