So you want to design some Free graphical objects, and turn them lose in the community. Wonderful. But what do you use to design them with? There are numerous packages out there for 2D, 3D and even 4D use - but which one is appropriate for your task? Not only for your personal use, but being an awesome person you're placing them in the hands of the community - so you'd better get your choice of tools and file formats right or people will find it hard to develop your objects further.