DipTrace 

DipTrace is an advanced PCB design software application that comes with PCB Layout module, powerful auto-router, Schematic Capture and Component/Pattern editors to design your own component libraries.
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DipTrace Free 

DipTrace is an advanced PCB design software application that comes with PCB Layout module, powerful auto-router, Schematic Capture and Component/Pattern editors to design your own component libraries.
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Engineering Power Tools 

ENGINEERING POWER TOOLS solves a wide variety of common engineering problems quickly and easily. Over 70 programs and data tables integrated into one easy-to-use package. Categories include Math, HVAC, Mechanical, Electrical, Materials & Structural.
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Canvas GIS Advanced (Mac) 

CANVAS 9 Advanced GIS Mapping Edition: Direct support for Geographic Information System data. You can take measurements in geographic coordinates, import any popular GIS file types into unlimited numbers of automatically aligned overlapping layers.
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Canvas GIS Advanced 

CANVAS 9 Advanced GIS Mapping Edition includes direct support for Geographic Information System data. Take measurements in geographic coordinates, import any popular GIS file types into unlimited numbers of automatically aligned overlapping layers.
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eMachineShop 

Totally free professional Computer Aided Design (CAD) software allows users to design in 2D and 3D. Easy uncluttered interface yet powerful. This free CAD software not only lets you draw objects but you can actually have your parts made!
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