Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Giftwhale - Giftwhale allows you to create personalised wish lists online.
FreeCAD - An open-source parametric 3D modeler
Wantt - Create & share wish lists for free
Sculptris - Sculptris: Enter a world of digital art without barriers.
GiftBuster - Wish list registry & shopping list app