Official Page  -  https://assetstore.unity.com/packages/tools/terrain/terrain-grid-system-47215  
Official Rating   5 / 25 Votes
Latest Version   11.0
Supported Editor Versions   2018.4.17 or higher
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Available downloads

  • Terrain Grid System v6.8     March 7, 2020
  • Terrain Grid System v9.0.2     March 7, 2020

  • See also... 

      Gaia 2 - Terrain & Scene Generator
      Relief Terrain Pack v3.3
      World Creator Standard
      L.V.E 2019 - Lava & Volcano Environment 2019
      Nature Renderer