As a seasoned artist, many tools are part of my process. I am familiar with the following tools, ordered by proficiency and frequency of use. Since many of them offer a multitude of functions, some detail on usage was added.
Unity3D: Integration of assets, scene management, Lightbaking, User Interface, Animation System, Material set-up
Adobe Photoshop: Texture Painting, Interface Design, Export Pipeline
Blender: Modelling, Unwrapping, Texturing, Basic Animation
Paint Tool SAI: Concept Art, Sketching, Rendering
InDesign: Layouting, managing large Documents
Office: Word/PowerPoint for documents and presentation
Since most of my projects are colorful and have a stylized look, the main pipeline usually did not include high-poly modelling or realistic textures. The following software I learned at university and I gained some additional understanding from using it outside of my regular work:
zBrush
Substance Painter
Autodesk Maya
Cinema 4D