Don't forget - PROCJAM has a lot of free resources for you!
Over 2000 Creative Commmons 3D and 2D art assets.
Hours of talks about generative software spanning four years of PROCJAMs.
Community-authored tutorials available in English, Spanish and Arabic.
Post your favourite resources in this thread to help everyone find stuff to help them jam!
I personally really like Adam Saltsman's tilesets: https://adamatomic.itch.io. They're fairly minimal and definitely don't fit every project, but look absolutely lovely! 馃槃
For the web developers who might want to dip a toe into procgen for the first time, I'm maintaining a mostly javascript-centric resource / links list on the subject. It includes libraries / packages, tutorials, technical / motivational videos and datasets. https://github.com/kchapelier/procedural-generation
As for assets, OpenGameArt.org is always a good website to keep on hand. For 2D tilesets I'd recommend checking the creations of Michele 'Buch' Bucelli.
Roguelike Celebration is an annual convention about procedural generation and other topics. Their talks are all free online and many are really inspirational and helpful! https://www.youtube.com/channel/UCKv_QzXft4mD6TXmQBZtzIA
