mapqonverter:Convert an ArcMap Project to a QGIS Project
SLDExporter:An ArcGIS Add-In that exports ArcMap layer symbology as SLD document or creates SLD style on published GeoServer layer.
matplotlib-arcgis:Matplotlib's new default colormaps as a style file for ArcMap/ArcGIS
Sentinel5P:Some scripts that help you downloading and processing satellite data from L2 to L3 products form Sentinel-5P mission: "perform atmospheric measurements with high spatio-temporal resolution, to be used for air quality, ozone & UV radiation, and climate monitoring & forecasting." Note that L2 products are processed measurements provided by ESA (https://sentinels.copernicus.eu/web/sentinel/missions/sentinel-5p) and L3 is the projection of these measurements into a common grid or raster (https://desktop.arcgis.com/en/arcmap/10.3/manage-data/raster-and-images/what-is-raster-data.htm)