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Flecs
An open C/C++ ECS supporting relations, hierarchies, cached queries, scheduling, reflection, and REST inspection.
Visit official siteContent updated Aug 1, 2026Automated check reached the official site · Checked Aug 24, 2026
Why use it
Complex simulations express parent-child, prefab, and state relations while exposing live world data in a browser.
Where it fits
Find engines, frameworks, code libraries, version control, and production automation.
architectureengine-programming
What to check
The rich model adds design choices, and poor queries or structural churn can create hidden performance costs.