BeamBoy is a free engineering utility for calculating stress and deflection of structural beams under load. May also be used for shafts. BeamBoy is menu-driven and intuitive.
MITCalc
This multi-language calculation package includes solutions for gearing, belt, chain, springs, beam, shaft, and many others. MITCalc support 2D and 3D CAD systems, Imperial and Metric units and many international standards (ANSI, ISO, DIN….).
OilProp
OilProp is designed to assess the core thermalphysic properties of oil and its derivatives necessary to solve transportation and processing tasks, with the minimum volume of input data.
RPN Engineering Calculator
More than 200 solutions with five unique keypads: Standard, Engineering, Magnetics, Trig, and Convert. It has a complete help system with individual tips for all but the most ordinary functions, a handy running tape display.
SimApp
Simulation tool for automatic control systems in the time and frequency domain based on the idea of block diagrams. Full visual block diagram editor. Simulation results are displayed in diagrams and data tables. More than 90 basic function blocks.
ComfortAir HVAC Software
ComfortAir HVAC software is designed to be used by engineers, architects, contractors and energy auditors for calculating and analysing heating and air conditioning hourly loads in commercial buildings. Units can be set to English or Metric.