This graphics tool essentially plots Bessel functions of all integral orders. What it actually plots are the Taylor's series and the asymptotic series simultaneously. The order of the function may be specified interactively, and several graphs can be viewed at the same time.

This tool can be used in an intuitive way, through zooming, to evaluate a Bessel function at selected points, or to find its zeroes.

This is part of a larger project that will eventually handle a much wider range of functions. Adding a function to the list of available functions is not too difficult, but requires writing the new function in Java as well (unfortunately) some of the core code.