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minetest_game
Minetest Game - A lightweight and well-maintained base for modding [https://github.com/minetest/minetest/]
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
GIMP saves large amounts of metadata by default. You can disable this in the "Export image as PNG" dialog but best would likely be to run your textures with optipng which losslessly optimises PNG images and removes this superfluous metadata. Minetest Game has a Bash script that runs optipng with the optimal settings on an entire directory recursively.
NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a more popular project.