Please read the license terms of each website and the licenses for models / designs before using them or uploading your designs to them.
3D Printing
- YouMagine –https://www.youmagine.com/
- MakerBot Thingiverse – http://www.thingiverse.com/
- Sketchfab –https://sketchfab.com/
- p3d.in –http://p3d.in/
- Treasure Island –http://treasure.is/
- Autodesk 123D –http://www.123dapp.com/
- Yeggi search engine –http://www.yeggi.com/
- Repables –http://repables.com/
Electronics
Software
- KiCad EDA Software Suite –http://www.kicad-pcb.org/
- LTspice simulation software –http://www.linear.com/designtools/software/
- SciPy Python software for mathematics, science, and engineering –http://www.scipy.org/
- GNU Octave – somewhat similar to Matlab – https://www.gnu.org/software/octave/
- Eagle EDA –http://www.cadsoftusa.com/
- Component Vendor online : [ Has searchable parts and manuals ]
- ASIC library :http://opencores.org/
- Open Source Hardware: