The EngineersToolbox (ETB) is a handy Java applet that both students and professionals will find useful. Geared mainly toward mechanical, civil, and structural engineers, the ETB has a wide range of functions. Its main categories are Static Analysis, Dynamic Analysis, Fracture Mechanics, Numerical Analysis, and Other Utilities. Each category has several more specific modules that perform calculations of stress and strain, fatigue, polynomial roots, and others. Graphical modules such as Bode plots and two-dimensional function plots are even useful for non-engineers, and there is an extensive material properties database. An excellent interface and easy-to-use controls make this software a great tool for school or work.