Sculptris

I modelled this in Sculptris, which is great free 3D software by the makers of ZBrush, then uploaded into Sketchfab. Sculptris is very intuitive 3D modelling software, which I use with my Wacom Cintiq 13HD, which even my four year old daughter uses easily! Sketchfab is a great online 3D viewer which now has the ability to import textures into it's material editor. Click on the image and view it in 3D in real time!

dr-paul_stickland.obj by paulstickland on Sketchfab

Sketchfab 3D Viewer

I just love Sketchfab, which is a 3D browser based viewer, which you can embed, as here, on loads of different blogs or websites, although sadly not G+ at present, which would be really welcome.
As a means of viewing and collaborating on 3D projects, without needing expensive 3D programs, this is so helpful.
Sketchfab supports most of the most popular 3D file formats.

This is just a test 3D .obj file of some leaves, created in Sculptris.
Click and hold to view, right click to zoom.