Modeling download
1.
Trace Modeler for UML Sequence Diagrams development tool, $119
Trace Modeler is an easy to use and smart editor for UML sequence diagrams... It instantly updates the diagram layout, freeing you to focus on the actual content... Ideal for documenting existing systems and brainstorming new designs.. And fast too!
2.
Design Master HVAC imaging software, $840
Design Master HVAC is an integrated HVAC building design and drafting program for AutoCAD. Features include 2D and 3D ductwork drafting, ductwork sizing, pressure drop calculations, and building load calculations.