www.godotengine.org/
An open-source 3D and 2D game engine and development environment.
Pretty sure everything is indie on itch.io but just in case you want something extra indie.
Suggest updated description
Contains (or is themed around interacting with) a musical score, soundtrack, or backing track(s).
Explore games made with Godot tagged Indie and Music on itch.io · Sell your games made with Godot on itch.io to have them show up here.
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