behaviac is a framework of the game AI development, and it also can be used as a rapid game prototype design tool. behaviac supports the behavior tree, finite state machine and hierarchical task network(BT, FSM, HTN)

Django friendly finite state machine support

squirrel-foundation is a State Machine library, which provided a lightweight, easy use, type safe and programmable state machine implementation for Java.

Finite State Machine for Go

Stately.js is a JavaScript based finite-state machine (FSM) engine for Node.js and the browser.

Lightweight Java State Machine

A finite state machine library using ES6 promises

Functional API for Microsoft Orleans http://orleanscontrib.github.io/Orleankka/

DFA regular expression library & friends

There is no state but what we make. Feel free to pitch in.

a featured FSM that can export state images

Go library for creating state machines

Fluent API for creating state machines in C#

Visual automata-based programming in functional JavaScript

🚦- Small Finite State Machines

A feature-rich, yet simple finite state machine (FSM) implementation in C

Unity HTFramework, A framework of client to the unity.

A finite state machine for Kotlin and Android

Lua libraries for graphics and audio programming

QP/C++ real-time embedded framework/RTOS for embedded systems based on active objects (actors) and hierarchical state machines

High-Performance Hierarchical Finite State Machine Framework

A simple finite state machine (FSM) with workflow character where you define your workflows in code.

QP-nano real-time embedded framework/RTOS for embedded systems based on active objects (actors) and hierarchical state machines

WS-Machine is a websocket finite state machine for client websocket connections (Go)

C++14 Finite State Machine library

With alexafsm, developers can model dialog agents with first-class concepts such as states, attributes, transition, and actions. alexafsm also provides visualization and other tools to help understand, test, debug, and maintain complex FSM conversations.

A Python library for simulating finite automata, pushdown automata, and Turing machines

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.

A finite state machine library for Node.js and the browser with a friendly configuration DSL.

Advanced state machines in Java.