[SWIM]

PTC Pro/ENGINEER is the best I've seen so far. Our team got Inventor for free, but for me, coming from NX UGS to that, it just felt too dumbed down and restrictive. I found out about Pro/E being available for free, so I signed the team up for that and haven't looked back. After you get used to it, it's way faster and more flexible. The automatic creation of weak dimensions and how well it automatically adds constraints really speed things up. I'm amazed that PTC is just giving out this software for free, it's really good stuff.

Honestly, I don't see why so many teams use inventor.