ProcJam http://www.procjam.com/ and its
Seeds magazine: http://www.procjam.com/seeds/
"red blob games" (articles): https://www.redblobgames.com/
"Here Dragons Abound": procedural generation of fantasy maps: https://heredragonsabound.blogspot.com/
"Thing on its Own": http://thingonitsown.blogspot.com/2018/08/what-is-this.html
Martin O'Leary - Terrain http://mewo2.com/notes/terrain/
Examples from Generative Landscapes (Joseph Claghorn): https://generativelandscapes.wordpress.com/index-of-examples/
Procedural Content Generation Wiki http://pcg.wikidot.com/
Herbert Wolverson - Procedural Map Generation Techniques: https://www.youtube.com/watch?v=TlLIOgWYVpI