As of recent updates, Fredo6 has transitioned many of his long-standing free plugins to a paid (premium) model to support ongoing development. SketchUp Community LibFredo6 Requirement
Unlike the native Scale tool, which stretches geometry uniformly, FredoScale allows for twisting, tapering, and stretching without distorting the underlying textures or proportions of specific components. Curviloft: sketchup plugin fredo6