Windows now comes with a built-in 3D cad program that appears to be targeted towards beginner 3D printing. Not a bad effort
You can also order prints directly though their service...
Thinkpad x220 Slack + DWM
Google: Don't Be Evil. Apple: Don't Be Greedy. Microsoft: Don't Be Stupid.
Google: Don't Be Evil. Apple: Don't Be Greedy. Microsoft: Don't Be Stupid.