Icon Toolbox for Sketch is a new plugin that aims to be “A set of tools for a perfect icon workflow in Sketch”. The developer states that it is a work in progress, but let’s hope they keep at it, because it looks useful.
“The end goal of this project is a plugin that will take the grunt work out of artworking new icons. It will make the process semi-automated, consistent and efficient. It will also automate the process of exporting optimized artwork into SVG, PNG and Icon Font formats…”