What are good programs used to render models?
There are many render software's that could be used but I would need to agree with Sudhir with Keyshot as it is the easiest to use great results and in real time with a professional looking render with little or no skills for the user to have to achieve great renders. If you feel like learning a little more about Keyshot and the other stuff you can learn about rendering then they have great tutorials on there web site @ www.keyshot.com
I have tried all those listed, and I think Keyshot, the fastest and easiest to use, however, bunkspeed shot is half the price. Photoview 360 was a side app, and is now integrated into SW12 (I think integrated in 11, not sure) but I prefer the PV360 stand alone compard to the integrated.