This program focuses on one task - finding numerical roots of mathematical equations - and it does so very well. I use if often because it's small, fast and convenient particularly when I need a simple graph of a function along with its roots to insert or paste into a class handout. I especially like the fact that I don't have to haul out the heavy and cumbersome equipment to handle such a routine task.

The program has a handy feature for moving and scaling graphs. If you move your mouse cursor to the edge of a graph a navigation arrow appears and clicking on it moves the graph in the corresponding direction. I would like to see some finer control over this process such as click-dragging the mouse to move the graph.