Friflo.Engine.ECS
An open C# ECS with SIMD queries, relations, events, JSON serialization, and Unity/Godot examples.
Why use it
Entity-heavy games gain data locality while retaining managed-language productivity.
Where it fits
Find engines, frameworks, code libraries, version control, and production automation.
What to check
The project is smaller than mainstream options; validate API stability and tooling against real gameplay loads.