FoxDot is an easy-to-use Python library that creates an interactive programming environment and talks to the powerful sound synthesis engine, called SuperCollider to make music. FoxDot schedules musical events in a user-friendly and easy-to-grasp manner that makes live coding easy and fun for both programming newcomers and veterans alike.

TidalCycles (or Tidal for short) is a language for live coding patterns.
It allows you to make musical patterns with text, describing sequences and ways of transforming and combining them, exploring complex interactions between simple parts.