Cesium, a platform for developers to build web-based 3D map apps, uses Bing Maps imagery to help power their services. Started in 2011, when WebGL was first released, as a lightweight web-based 3D virtual globe engine for the aerospace and defense market, Cesium is now used across many markets from autonomous driving to drones to augmented reality.
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Today, we’re announcing a closer and much deeper relationship with ESRI by integrating Bing Maps Virtual Earth tiles into their ArcGIS Desktop product. 
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Isaac Kunen from the SQL Server team published an outstanding MSDN article entitled, “Introduction to Spatial Coordinate Systems: Flat Maps for a Round Planet.” This is a great article for those of you who are just getting started in GIS, are curious about GIS but intimidated by math and coordinate systems or just plain geeky and like maps. 
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ESRI jdoes support using Bing Maps in both their Desktop and Server offerings. 
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We just released tons of new imagery and 3D models. The list is in the blog!
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