What are free tools for unwrap modifiers 3D models?

Free tools for unwrapping 3D model UVs (using unwrap modifiers) include Blender’s native UV Unwrap, GIMP with UV mapping plugins, and UVLayout’s free trial. Blender’s tool is built-in, so you can edit UVs directly in your 3D workflow without extra software. GIMP adds UV editing to its free image suite, great for refining maps alongside models. UVLayout’s trial lets you test basic unwrapping features before buying. For beginners, start with Blender—it has tutorials and community support to help you learn unwrap modifiers easily.