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27. Twinmotion (Free until 2025)

Epic Games made Twinmotion free for a limited time (frequently extended). It is the easiest archviz tool for Unreal Engine assets.

28. Tableau Public

For data visualizers. You create interactive dashboards and maps. The "Public" version is free, though your work is stored on the cloud.

31. Material Maker (Open Source)

Create procedural textures (PBR) and materials. Competes with Substance Designer. Export to glTF, UE4, or Unity.

20. Rive (Free for public files)

Used for interactive motion graphics. You design animations that react to user input (hover, click, drag). The free plan allows unlimited public files.