Top STATE GitHub Repositories & Tools (2026)

Minimal Finite State Machine

ROS 2 localization for outdoor robots: IMU, wheel encoders and GPS fused in a 23-state UKF at 100 Hz. When the estimate goes wrong it reports which sensor and why, instead of drifting silently. Apache 2.0.

Umple: Model-Oriented Programming - embed models in code and vice versa and generate complete systems. Save yourself lots of coding. Do it collaboratively online in UmpleOnline, in an IDE or on the command line.

Open-source Terraform Enterprise replacement

The PolicyEngine US Python package contains a rules engine of the US tax-benefit system, and microdata generation for microsimulation analysis.

C++ based Hierarchical / Finite State Machine library oriented for embedded and RTOS systems.

Static analysis and state mutation auditor specifically designed for FrankenPHP's Worker Mode.

Build your design system in React, Solid, Vue, Svelte or Vanilla. Powered by finite state machines

ShopClass: free, open-source, self-hosted classifieds software in PHP. Run a classifieds site, marketplace, job board, property or car listings. The modern successor to Osclass.

NeqSim is a library for calculation of fluid behavior, phase equilibrium and process simulation