Additional softwares and plugins for solidworks

Which are the necessary and useful plugins for solidworks? I intend to start design services in machine tools, industrial automation, material handling etc
4 Answers

pretty much all the plugins and third party add-ins can be found on SolidWorks' site.
http://www.solidworks.com/sw/products/engineering-software-partners.htm

I using Power surfacing, and it helps me create almost organic shape. I do 3d printing and looked nice! check out my 3d showcase:https://sketchfab.com/pattap/models
I use, nhựa in 3D PLA : http://in3dplus.com/shop/soi-nhua-in-3d-abs-pla/ to make prototype ^^