How to use Midjourney to create AI-generated art for your board game:

https://boredgameslab.wordpress.com/2022/07/27/how-to-use-midjourney-to-create-ai-generated-art-for-your-board-game/

This website turns your quick digital sketches into AI-generated images:

http://collage.artbreeder.com/

Tips for making board game prototypes faster and cheaper (video):

https://www.youtube.com/watch?v=hxFJ2udcDq8

How board game designers use 3D printers for prototyping—a Twitter designers discussion:

https://twitter.com/tonymakesgames/status/1530378700767870976

Elizabeth Hargrave on game design lessons she’s learned, including on getting inspiration, failing faster earlier, prototyping cards, finding bits, articulating your vision, and more (video)

A walkthrough of how to create board game prototype cards in PowerPoint (video):

https://www.youtube.com/watch?v=hmoP7QMYyS0

AI-generated cyberpunk and fantasy art for game prototypes, available for pay-what-you-want under a Creative Commons license:

https://walterlicinio.itch.io/gen-arts

Digital prototyping tools: pros and cons of Tabletop Simulator, Tabletopia, Tabletop Playground, and Screentop.gg (video)

This remixable collection of illustrated characters is free to use:

https://www.openpeeps.com/

3D printing for tabletop game design: the basics plus tips and tricks (video)

Free information symbols for board games: duration, amount of players, skill level, and more:

https://kenney.nl/assets/board-game-info

Tabletop Playground: an overview of the virtual tabletop software, how it works, and how designers can bring their games to the platform (video)

Screentop.gg: an overview of the virtual tabletop platform, what it’s capable of, how to create a prototype on it, and various tips and tricks (video)

Lots of free board game icons, for use however you want:

https://kenney.nl/assets/board-game-icons

This simple Excel template lets you easily create and print basic cards for a prototype:

https://roboticduckdesigns.com/2021/12/12/design-tool-printable-card-design-spreadsheet/

Two sites for creating AI-generated artwork:

https://www.artbreeder.com/

https://www.wombo.art/

Early steps in board game design: pointers for making your first prototype:

https://lootbaggames.wordpress.com/2021/11/19/the-leap-from-imaginative-to-creative-making-a-prototype/

Game design lessons, revisited with eight more years of experience (video)

How to import a set of cards into Tabletop Simulator:

https://blog.tabletopsimulator.com/blog/create-cards-for-your-game-with-tts

This tool can help game designers determine card-draw probabilities for their designs:

https://deckulator.appspot.com/