I released my free Procedural Terrain Generator(Its very advanced with Several noise algorithms, node editor, erosion and is a strong alternative to professional tools like Gaea or world machine) : r/IndieDev
3D Map Generator - Terrain on Behance
3D Terrain Software: Aerialod by ephtracy (free) - YouTube
Instant Terra - Terrain generator for ultra-fast landscape creation
2021 New iClone Nature Terrain Generator created by Adolf Antareus | Python plug-in tool included | Nature Terrain Generator - Inspired by the real photographs of scenery, Adolf Navarro is proud to
Free Terrain Generation for Blender [Blender 2.8 and Python] | English - YouTube