2D drawing software / tools (to use with the laser cuter and the CNC)

Inkcape : http://inkscape.org (free)
Coreldraw ($)
AutoCad ($)
Illustrator ($)
DraftSight : http://www.3ds.com/products-services/draftsight/overview/ (free and $)

Step one: Goto SDPSI (as an example) and click on a specific L timing pulley part number. (https://sdp-si.com/eStore/Catalog/Group/346#)
Click on STC parts link and “download 3D models”.
On new tab, select file format “step, .stp”
Let the internal website software convert the file for you (takes 30 seconds) and click download
Open the downloaded zip file containing a stp file, such as “a_6a_4-10df05016.stp”
Open freecad and open the step file
On the lefthand side, click the part name under “unnamed”
Under the help menu there is a submenu selection tool. Select “Mesh Design” and the top menu will change to include “Meshes.”
Select mesh > create mesh from geometry, and leave the value at 0.1 on the next screen. Hit enter.
Now on the left hand side, click “mesh”
On the meshes menu, select export mesh. Select “Binary STL.”
You can now process this with Slicer, Tinkercad, Sketchup (with import library included on this site).
Print free parts!!

Online : http://www.makercase.com/

Radiolara : http://n-e-r-v-o-u-s.com/radiolaria/ Radiolaria lets you manipulate a web of connected cells to create a huge variety of biologically-inspired patterns.
QR stenciler : http://fffff.at/qr-code-stenciler-update/ Generate QR that can be lasercut and use as stencil.
Barcode generator : http://www.terryburton.co.uk/barcodewriter/generator/

123DMake : http://www.123dapp.com/make Turn your amazing 3D models into even more amazing build-your-own projects.
QRC Sketchchair : www.sketchchair.cc SketchChair is a free, open-source software tool that allows anyone to easily design and build their own digitally fabricated furniture.
Sketchup plugin for folding paper : http://www.pumpkinpirate.info/flattery/
Lithophane : images (greyscale) to 3d print or CNC mill as low relief ("bas-relief") or lithophane http://3dp.rocks/lithophane/(free, online software)