Sheet Lightning is a specialised engineering 2D/3D CAD System for creating and unfolding sheet metal designs for fabrication or manufacture. It handles everything from simple cylinders, cones, rectangular ducts and ovals, to adapters, adapting any of these section types, interections and multi-intersections between of any of these types to any level of complexity.

Uconeer
Freeware. 390 units in 46 categories. Includes engineering specific categories like enthalpy, heat capacity, heat transfer coefficient, torque and viscosity. Work with feet and inches. Formatting and clipboard features. Excludes archaic units.

Exfilt
Quickly and easily design or analyze stormwater detention ponds and below grade systems for exfiltration/infiltration. Design stormwater systems to meet exfiltration volume drawdown time criteria.

Astra R-Nesting
Astra R-Nesting system provides entry and storage of information about orders and materials, automatic and interactive nesting, utilization of rests, printing nesting plans and specifications, estimation of cost of works carried out.

WetRO
Quickly and easily design or analyze stormwater collections system pipes with this useful tool. Any number of inlets and pipes and any number of collection systems can be input depending on user's hardware/system memory.

Copan Pro
Copan Pro enables you to calculate coordinate geometry (COGO), process field surveys, adjust map traverses, perform map/deed closure checks, calculate areas and perimeters, transform coordinates, import/export Ascii files, and draw lines and symbols.