Ordinary Differential Equations is a Education::Mathematics software developed by Numerical Mathematics. After our trial and test, the software was found to be official, secure and free. Here is the official description for Ordinary Differential Equations: Solves boundary-value or initial-value problems involving nonlinear or linear ordinary differential equations of any order, or systems of such. The conditions may also be linear or nonlinear equations involving the unknown functions and their derivatives. The solution produced is a continuous function in the form of finite power or trigonometric series, depending on the program, of user-specified number of terms valid in the entire defined interval and expanded about a user-chosen center of expansion. Results, including the graph, can be saved or printed. You can also copy the graph to the clipboard, which you can then paste where you please (Word, Paint, etc.). You have one-click control of the graph with zooming, panning, centering, etc. The solution may be stored in a file which may be later read by a suitable program (like POWER AND TRIGONOMETRIC SERIES) to further study it to find roots, maxima and minima, derivatives, integral, graph. You can predefine any recurring constants. Handles a wide variety of functions, including trigonometric and hyperbolic. Results can be saved or printed. Includes a help file with instructions, examples and methodology. you can download Ordinary Differential Equations 1.00 free now.