Blender - Blender is the open source, cross platform suite of tools for 3D creation.
ACDSee - ACDSee is an image viewer that uses very little system resources, and it has a small, sleek size that won't take up much space on your system.
FreeCAD - An open-source parametric 3D modeler
digiKam - Professional Photo Management with the Power of Open Source
MATLAB - A high-level language and interactive environment for numerical computation, visualization, and programming
Flickr - image and video hosting website