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bgfx
Cross-platform, graphics API agnostic, "Bring Your Own Engine/Framework" style rendering library.
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InfluxDB
InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
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olcPixelGameEngine
The official distribution of olcPixelGameEngine, a tool used in javidx9's YouTube videos and projects
SFML isn't bad. But I had a lot of issues with it. If you want a super lightweight engine with basically only a minimal amount of functions and can get stuff drawn on the screen fast then I'd say Pixel Game Engine. Just a single .h file and you are good to go. There are extensions for it for more functions like game pad support. C++ only and it doesn't hold your hand or get in the way. https://github.com/OneLoneCoder/olcPixelGameEngine
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Godot maybe? You can script in C++ (sort of UE style) OR just code in actual C++, recompile it, mod it, rip some parts (3D parts probably for your case), etc. etc. https://github.com/godotengine/godot
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Maybe raylib? https://www.raylib.com/
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives