
Description: SaiCalculator is a free, ad-free calculator app that offers both basic and scientific features for mobile devices. It provides a clean interface with large keys for easy use and supports advanced functions like trigonometry, logarithms, exponents, and more.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Graph.tk is a free online graph and diagram creation tool that allows users to easily create flowcharts, uml diagrams, network diagrams, mockups, floor plans, and more. It has an intuitive drag and drop interface with various templates and shapes.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API