You can use the Nouns artwork and any other dev resources freely for any project for any purpose. It's CC0 ↗︎ (public domain, a.k.a. no copyright!).

Nouns Dev Resources

Smart Contract Architecture →

• GitHub - https://github.com/nounsDAO ↗︎
• Nouns Protocol - https://nouns.center/dev/nouns-protocol ↗︎
• Nouns API option 1 - https://noun-api.com/ ↗︎
• Nouns API option 2 - https://cloudnouns.com/ ↗︎
• Nouns API option 3 - https://noun.pics/ ↗︎
• Nouns Subgraph - https://thegraph.com/hosted-service/subgraph/nounsdao/nouns-subgraph ↗︎
• Onchain Nouns Generator – https://nouns.center/dev/generate-on-chain-noun ↗︎
• Nerman Bot – https://nerman.wtf/ ↗︎
• More resources - https://nouns.center/dev ↗︎

Nouns Assets

• Nouns Fonts – https://noundation.xyz/styles/typography ↗︎
• Nouns Color Palette – https://noundation.xyz/styles/colors ↗︎
• Nouns Icons – https://noundation.xyz/styles/icons ↗︎
• Unicode Noggles – https://noundation.xyz/resources/noggles ↗︎
• Nouns Assets (svg, png) – https://nouns.center/assets ↗︎
• Nouns 3D – https://3dnouns.com/ ↗︎
• Figma file – https://www.figma.com/community/file/1114615324301474327/Nouns.wtf---All-traits ↗︎