IsoPlot

Add some variation to your isometric pixel art by making some of your props non-axis aligned, giving objects a bit of rotation relative to each other. This is a very light tool to aid in plotting isometric shapes that aren't axis aligned. Specify the dimensions of the projected rectangle you would like to create, as well as the rotation of the rectangle.

If you need a larger tool for plotting axis aligned volumes maybe try Isobox - https://darkwark.itch.io/isobox-for-aseprite

The script is tested against Aseprite 1.2.13

Source also available on github: https://github.com/pulponite/IsoPlot