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). Here you can find different resources to get started with Nouns.

Nouns Dev Resources

• GitHub - https://github.com/nounsDAO
• Smart Contract Architecture - https://nouns.center/dev/smart-contract-architecture
• Nouns Protocol - https://nouns.center/dev/nouns-protocol
• Nouns builder API - https://noun-api.com/
• Nouns image API - https://noun.pics/
• More resources - https://nouns.center/dev

Nouns Assets

• All traits, colors, fonts, icons - https://www.noundation.wtf/
• All traits, colors, glasses - https://nouns.center/assets
• Nouns Playground - https://nouns.wtf/playground

Nouns Art Tools

• Edit traits - https://studio.noundry.wtf/
• Edit traits https://jetstream.wtf/
• Add glasses to images - https://nounify.wtf/