http://apps.123dapp.com/catch/

Online tool for creating/displaying 3D models from a set of photographs - note the display is not currently embeddable in MyPortfolio.

https://sketchfab.com/

Tool for the annotation and display of 3D models. The display is embeddable in MyPortfolio.

http://www.metaio.com/

Downloadable tool for the creation of Augmented Reality applications (scenes).

http://www.junaio.com/

Examples and downloads for the Junaio Augmented Reality browsers 

http://www.gimp.org/

Free image manipulation tool - if you don't have access to photoshop this is a good alternative.

http://www.blender.org/

Blender is a free opensource 3D modelling application - the software is very powerful but has a steep learning curve - it can be used to 'tidy up' the 3D meshes created by the 123catch application but is not for the faint hearted!