Procedurally generated planets, with data for elevation, rivers, soil depth, soil texture, rock types, minerals, climate and plenty more. : r/proceduralgeneration
Planet Workshop - Procedural planet generator and exporter - Unity Forum
ArtStation - Planet Generator for Substance Designer
Free Online Planet Building Tools - MonsterBrainSoup
PlanetMaker
Rye Terrell on Twitter: "Excited to release my completely free #webgl/@stackgl 3D planet texture generator. Enjoy! https://t.co/SamGcTiH4g https://t.co/9k1AJ7odvR" / Twitter