GeoTools.xyz gives you an easy way to do some common GeoDev tasks. For example, retrieving the lat/long coordinates of a location in multiple coordinate systems, or getting the extent of a map. The coordinates are delivered in JSON format.
Check here for more information: https://www.geotools.xyz/
GIS Data Utilities
The GIS Data Utilities created by dymaptic is a set of evolving scripts that facilitate managing GIS data. The repository contains python scripts to help with managing a geodatabase. These scripts are especially useful during the initial phases of development when the database schema can change. Using CSV files as input, you can create feature classes, standalone tables and relationships.
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