GitHub repository: microsoft/SQLServerSpatialTools
Primary language: C#
Description: This project is a collection of tools for use with the spatial types in SQL Server. This project does not provide an end-user application, but rather a set of reusable functions which applications can make use of.  These functions may include data conversion routines, new transformations, aggregates, etc. Please feel free to suggest additional functionality.  This project is sponsored by Microsoft, but we welcome outside developers.