
Description: CircuitLab is an easy-to-use, online circuit simulator and schematic capture tool. It allows users to easily create, analyze and share circuit designs with drag-and-drop interface and simulated interactive testing.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: simulator.io is a cloud-based simulation platform that allows users to model, simulate, and analyze complex systems. It provides an intuitive drag-and-drop interface to build simulations without coding.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API