Rive

Rive is an interactive design and animation tool with open-source runtimes that play its files natively on the web, iOS, Android, Flutter, React, game engines such as Unity and Unreal, and more. Designers build state-machine-driven graphics in the editor, or generate them with a CLI, and the same file ships to production through a GPU-accelerated vector renderer, so nothing is re-implemented in handoff. It powers Spotify Wrapped and Duolingo, and is worth learning for interactive product UI and motion that responds to input.