Have a look at www. luizmonteiro. com (can't post URL with less than 10 posts). There are few simple to use, but really nice simulators for NDB (ADF), VOR, HSI, RMI. No need to install anything.
Significantly more time consuming, but interesting option would be installing flight simulator like X-plane 11 with pedals and yoke. If properly set and adjusted - it can be an invaluable training tool for the Instrument rating with ultra realistic scenarios and cockpits.