This week, The Engineering Zone will feature calculator applications.
One of my Favorite PC calculators is GraphCalc (also available for Linux). It is fast, easy, and you can use your number pad for input. Even though it was last updated in 2003, it still works great on newer computers with Win7.
GraphCalc is ready to use out of the box. Don’t bother reading the documentation. Just start the program and you’ll see how easy it is to use.
Have a look at some screen shots of GraphCalc
This software is free and open source, so you can use it everywhere. You can even export the 3d plots to DXF files. These files can be imported into other programs. This is convenient for surfaces that can be defined by a mathematical equation.