My primary open source project is a Python library for reading and writing geospatial raster data called Rasterio. It's a bridge between the domain of spatially referenced gridded data in GeoTIFFs and the domains of machine learning and computer vision. I get paid to work on Rasterio at Mapbox, which is wonderful, though I don't get to work on it exclusively.
The stars have aligned for Rasterio this quarter of 2018, and during April, May, and June I will be working half-time on the project. We're going to have a 1.0 release and here is intro to the plan. Get ready for some beta releases soon.