Finite State Machine Builder
"FSM Engine is an open-source, web-based tool for creating, editing, and visualizing Finite State Machines. It pairs a powerful, framework-agnostic TypeScript engine (
@fsm/engine) with a rich, canvas-driven Svelte 5 frontend — giving you both a programmatic API and a visual editor in a single monorepo.Whether you're a student learning automata theory, an educator preparing a lecture, or an engineer prototyping state-driven logic, FSM Engine gets you from concept to diagram in seconds."