I think most of the graphical design sofwares should include at least some very basic level of animation tools. Like in Photoshop I’ve nowadays found many good uses for animation tools. Too often it would be hard work to transfer all assets to other software just for creating simple animations. Still, it doesn’t need to be such a complex system…

Source: Creatide/AnimateMate: Create your animations directly in Sketch using AnimateMate.