Guide-post for 3D graphics and CAD
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SagCAD (2D CAD - GPL)
Sailcut CAD (3D CAD - sail design and plotting software, GPL)
ScriptCAD (2D CAD)
SeaSolution (3D CAD - marine industry)
Shape CAD (Architectural Pocket 3D CAD)
SharpConstruct (modeler - GPL)
Silo
(3D modeling application with the ability to effortlessly switch between organically sculpting high-polygon models and precisely controlling hard-edged surfaces.)
SketchUp (3D CAD)
SoftCAD 3D (3D CAD)
Solid Edge (3D CAD)
SolidWorks (3D CAD)
Spirit (3D CAD)
Strata 3D (complete 3D)
Stratis (3D CAD - drive-way...)
Surface Evolver
(modelling of liquid surfaces shaped by various forces and constraints)
Sweet Home 3D
(...is a free interior design application that helps you placing your furniture
on a house 2D plan, with a 3D preview - GPL)
SolidWorks (3D CAD)
Spirit (3D CAD)
Strata 3D (complete 3D)
Stratis (3D CAD - drive-way...)
Surface Evolver
(modelling of liquid surfaces shaped by various forces and constraints)
Sweet Home 3D
(...is a free interior design application that helps you placing your furniture
on a house 2D plan, with a 3D preview - GPL)