If you are the kind of person who is pulled into programming, who is compelled to program, I would advise you to be optimistic and program as much and on as many different projects as you can. Spend as much time as possible on the computer but learn to accurately judge your own burnout level, and don’t worry if people think you’re weird. – Ray Ozzie

Q3Plan

RationalCAD

PoseDesigner

Exact3D