IcoFX - IcoFX is an all-in-one solution for icon creation, extraction and editing.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
IconWorkshop - Application to create and manage software icons. A must for developers.
Autodesk 3DS Max - 3ds Max is software for 3D modeling, animation, rendering, and visualization. Create stunning game enrivonments, design visualizations, and virtual reality experiences.
IconLover - Icon editor for Windows.
ZBrush - ZBrush is a digital sculpting and painting software solution.