Alternatives to Falstad CircuitJS

Logic designer and circuit simulator

Electronics design automation suite

Chromium-based web browser

SPICE simulation software, schematic capture and waveform viewer

Create and play with small Electron experiments

Javascript frontend for Wolfram Engine

Open-source agentic browser

JavaScript playground that auto-evaluates as code is typed

Node-based data application for visualisation and generative design

Multi-agent programmable modelling environment

Open-source virtual modular synthesiser

Model rocket simulator