Created by Joe Wu, also known as Im3dJoe, InstantQPatch is a smart hole-patching utility designed specifically for polygonal meshes. InstantQPatch automatically generates an all-quad patch that seamlessly follows the surrounding surface curvature, much like a NURBS surface.
The tool is free and available for both personal and commercial use, whether you're a freelance artist or working within a studio. However, distribution, sharing, or modification of the code to create derivative versions is strictly prohibited.
You can grab InstantQPatch here and explore more of Im3dJoe's time-saving Maya tools on Gumroad: