The best replacement for solidworks is autocad.

The best alternatives to solidworks are rated as following:
★★★★★  autocad
★★★★★  inventor
★★★  catia
★★★  solid edge
★★★  rhino
★★★  pro e
★  autodesk inventor
★  pro engineer
★  proe
★  sketchup
★  creo
★  blender
★  autodesk
★  inventor 2014
★  nx
★  unigraphics
★  3ds max
★  cad
  mastercam
  alibre
  ansys
  alias
  inventor better
  autocad inventor
  inventor 2011
  spaceclaim
  solidedge
  vectorworks
  geomagic
  wildfire
  google sketchup
  sketchup pro
  inventor 2015
  inventor 2013
  autocad 3d

Your alternative for solidworks is not listed? Suggest!
Speaking about solidworks, one probably shouldn't forget about cosmos.

Other search terms related to solidworks and their ratings are:
★★★★★ cosmos
★★★★ mastercam
★★★★ labview
★★ intel hd 4000
★ pdm
fea
wacom tablet
solidcam
You have in mind a companion for solidworks and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of solidworks in all years. Click on graph for more.
solidworks
autocad
inventor