Platforms: iOS ($4.99), Android ($4.99)
SketchBook Pro is billed as an artist’s app, but that doesn’t mean it can’t also be effectively used for business. For just $5, this app is pretty full-featured—it even includes multiple layers, brushes, and tools, as well as extra-large canvases. It’s great for tablet artists, but it’s also useful for creative types in business. SketchBook Pro can be used for anything from creating mind maps or product renderings to taking notes (or doodling) in a boring meeting. The iOS-only Paper app also gets high marks from designers and doodlers. For Windows 8 tablets, check out Fresh Paint.