play-nextjs

Next.js SaaS Boilerplate and Starter Kit designed and built for SaaS startups. It comes with all necessary integrations, pages, and components you need to launch a feature-rich SaaS websites. Maintained by NextJSTemplates on GitHub, where it has earned 608 stars from the community.

It's actively developed around free, next-auth, nextjs, and is a solid reference for anyone building with these tools.