1. Move To Library Sketchplugin You can now move symbol from your project to any library and re-attach all the symbol instances to this library. also it keep the overrides without any problems and it work with abstract that have libraries not in your local machine
2. Overrideit SketchpluginOverrideit is sketch plugin that allow designers to search in overridelist and overrides dropdowns, and with many other features.
4. Symbol-stateCreate States for each symbol by adjusting the overrides and save it with a name then use it where ever you want