Synthesine is described as 'Web playground for synthesizing sound waves from scratch. You can use it to create sine waves, white noise, and other building blocks of sound, and then pass these through modular components to synthesize more complex sounds like bells and whistles' and is an app in the audio & music category. There are more than 10 alternatives to Synthesine for a variety of platforms, including Windows, Web-based, Self-Hosted, Mac and Linux apps. The best Synthesine alternative is SuperCollider, which is both free and Open Source. Other great apps like Synthesine are Sonic Pi, Faust, Klangmeister and ChucK.
Gibber is a creative coding environment for audiovisual performance and composition. It contains features for audio synthesis and musical sequencing, 2d drawing, 3d scene construction and manipulation, and live-coding shaders.
Extempore is a programming language and runtime environment designed to support the programming of real-time systems in real-time.
Evaluator is an audio creation app that lets you write short C-style programs whose output is used to generate sound! It's available as a standalone app or as a VST plugin for your DAW.
