There are 2 repositories under fsm-library topic.
Lightweight Java State Machine
Python Finite State Machines made easy.
High-Performance Hierarchical Finite State Machine Framework
KStateMachine is a powerful Kotlin Multiplatform library with clean DSL syntax for creating complex state machines and statecharts driven by Kotlin Coroutines.
Fast, easy Javascript finite state machines with visualizations; enjoy a one liner FSM instead of pages. MIT; Typescripted; 100% test coverage. Implements the FSL language.
FSM implementation generated from Mermaid/PlantUML textual representation
A finite state machine library for Zig
Finite State Machine in Kotlin
Hierarchical Finite State Machine Framework
C++ based Hierarchical / Finite State Machine library oriented for embedded and RTOS systems.
Arduino/ESP library to simplify setting up and running a state machine.
A simple Finite State Machine for Godot
C++ State Machine generator for Xstate
High-Performance Flat Finite State Machine Framework
yasmine - the C++ UML state machine framework
State Machine for PHP
A Buffet Of C++17 State Machines
Finite-State Machines for Java
Enterprise level Finite State Machine (FSM) for the modern Web Apps built with the Yii2 framework
State machine controller for Unity.
State Machine written in C++11
A hierarchical finite state machine library for Factor
Lightweight C++ header-only library for simple finite state machines with easy state transitions and optional thread safety.