
Description: Helvum is an open-source cross-platform note taking app focused on flexibility and customizability. It allows users to organize notes into customizable notebooks, supports tagging, linking between notes, embedding media, and has a variety of text formatting options.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: BlackHole is a virtual audio driver for macOS that allows applications to pass audio to other applications with zero latency. It's useful for routing audio between music apps, streaming audio, or using audio apps without sound cards.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API