2D design
GIMP | Photoshop | MyPaint

vector
Inkscape | Illustrator | oodraw| QCAD| Eagle

3D design

FreeCAD | QCAD | JWCAD | Blender | SketchUp | 123D | Rhino | 3Dtin | tinkercad | Grasshopper | SolidWorks | Catia | VectorWorks | Shade | Maya | Alias | 3ds Max | メタコセイア | 六角大王

Software Programming
Processing | OpenFrameworks

Hardware Programming
Arduino | pSoc | AVR | PIC

Sound Processing
MAX/MSP | PureData | vvvv

FabLab
Fabmodules | Kokompe | FabLabModelMaker