I created free software called SteadyMouse[1] back in 2005 to remove this tremor while letting normal mouse motion through. It eventually moved up near the top of Google's search results. At the same time, the free version began to show its age with compatibility issues. I spent the last two years on a massive rewrite for a commercial version and formed a single member LLC to carry it back in July 2016.
Revenue is not enough to quit my day job writing automotive firmware, however it's still a nice bit of allowance on the side. I enjoy the stories from users mostly as well as trying to automate the repetitive tasks so I can focus on coding.