I may be guessing here but you seem to be asking for apps that require no or little learning.
-> That's a bad idea. Why? I find that apps that are too easy usually can't do much.
I work in plastic manufacturing but I'm old school - most of my experience is with injection molds. Our company has just partnered with a small 3d printing company and I wanted to get to know a bit about it to ease communication. I already asked some of the people in the 3d printing department what software they used and they each had their preferences. I was wondering if anyone here had any suggestions for the most intuitive 3d printing software. I already asked the guys over at http://www.mcadcentral.com/ but they're at a professional level that's a bit difficult for me to follow. I understand this could be simply sink or swim with no gray area but if anyone can recommend any beginners software for 3d printing, I'd be much obliged.