Blender 3D is a professional level open source 3D design tool. It has tons of features, a robust development community and a huge worldwide community of users. It is used for 3D design for diverse applications from video games to scientific visualization to 3D printing.
You can download it from www.blender.org/download
This group is a place to discuss all things Blender 3D including (but not limited to) new features, modeling techniques, questions, addons, works in progress, etc. Come share knowledge, get constructive feedback, and ask questions.
Join to add your Blender designs to this group's Things. I'll feature awesome Things that include the .blend file used to make it so members have a set of reference designs to learn from.