Idk if these are good or not bu the first one is geared toward game developers specifically.
http://www.zmodeler2.com/ (http://www.zmodeler2.com/)
http://www.alibre.com/xpress/software/alibre-design-xpress.asp (http://www.alibre.com/xpress/software/alibre-design-xpress.asp)
http://www.le-boite.com/minos.htm (http://www.le-boite.com/minos.htm)
http://www.seamless3d.com/ (http://www.seamless3d.com/)
http://www.3dvia.com/software/3dvia-shape/ (http://www.3dvia.com/software/3dvia-shape/)
Once again idk if they are good or not but they are modelers. I think the seamless one is good but hard to learn, at least from its review.