Gordon_W has written
What kind of softwares you use to create models for objects and items?(xxxx.b3d etc)
Each person ends up using their own methods. I offer free ones, but I am a bit hypocritical in that although I advocate the free tools, I barely ever use them because my development time is greatly reduced by using commercial tools (a common difference between free and commercial software).
For free users (who don't have mass amounts of money), DeleD Community Edition (google it) is a free modelling suite with a B3D import/exporter. However, I personally use 3DStudio Max 2009 for model design and UltimateUnwrap3D for converting 3DS exported models to B3D. Both of which are commercial and NOT cheap.