1)   Mechanics 1
Mechanics is a Virtual Laboratory of Mechanics. An Intuitively Easy-To-Use collection of -at least- 51 interactive Mechanics simulation modules that allow the user to simulate and visualize experiments. An enlightening set of simulators.

 2)   MITCalc - Technical Formulas 1.13
Solutions to dozens of basic formulas from physics, technology and mechanical engineering. Help, pictures as well as many selection tables with values of various coefficients and material properties are available for the formulas. Units convertor.