
Description: AudioKit FM Player is an open-source, easy to use FM synthesizer instrument app for iOS. It allows you to explore FM synthesis with over 20 included presets, or design your own custom sounds.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Surge Synthesizer is a free, open-source digital synthesizer plugin for music production. It features multiple wavetable, analog, and hybrid synth engines with effects, modulation options, an arpeggiator, and more for crafting sounds.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API