www.lwjgl.org/
Lightweight Java Game Library an open-source Java software library for video game developers
Pretty sure everything is indie on itch.io but just in case you want something extra indie.
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Contains tools for creating custom levels or other user-generated content.
Explore games made with Lightweight Java Game Library tagged Indie and Level Editor on itch.io · Upload your games made with Lightweight Java Game Library to itch.io to have them show up here.
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