Official Page  -  https://assetstore.unity.com/packages/tools/utilities/meshkit-mesh-decimation-separation-combining-and-editing-tools-39794  
Official Rating   5 / 15 Votes
Latest Version   2.1.1
Supported Editor Versions   5.6.4 or higher
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Available downloads

  • MeshKit - Mesh Decimation Separation Combining and Editing Tools v2.1.1     December 30, 2020

  • See also... 

      Optimizers
      Ultimate LOD System MT
      Viewport Walker + Only Renderer
      Lighting Box 2 Next-Gen Lighting Solution
      Poly Few / Mesh Simplifier and Auto LOD Generator