
Description: API Plug is an open-source API mocking tool that allows developers to create, share, test and validate APIs without having the back-end ready. It provides a simple graphical interface to define APIs and generate mock responses with configurable latency and error conditions.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: RestDB.io is a fast and simple NoSQL cloud database service for serverless applications. It allows storing and querying document-oriented data via a RESTful API, with free and paid tiers available.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API