Next.js is a popular React framework for building server-rendered React applications. When it comes to Content Management Systems (CMS) integration with Next.js, you have several options to consider. Here are some popular CMS choices that can be used with Next.js:

1. Strapi:
   1. Strapi is a headless CMS that provides an open-source, customizable content management system.
   2. You can use Strapi to create, manage, and deliver content via RESTful APIs or GraphQL.
   3. Strapi can be integrated with Next.js easily to fetch and display content from the CMS.
2. Contentful:
   1. Contentful is a headless CMS that allows you to create content models and deliver content via APIs.
   2. It provides a Next.js integration package (next-contentful) that simplifies fetching and rendering content in a Next.js application.
3. Sanity:
   1. Sanity is a real-time, collaborative headless CMS with a customizable content model.
   2. You can use the @sanity/client library to fetch data from Sanity and render it in your Next.js application.
4. WordPress:
   1. While WordPress is typically associated with PHP, you can use the WordPress REST API to fetch content and integrate it into a Next.js application.
   2. There are also packages like “wpapi” that make it easier to work with the WordPress REST API in a Next.js project.
5. Prismic:
   1. Prismic is a headless CMS with a focus on content modeling and content delivery through APIs.
   2. Prismic provides a Next.js integration package (prismic-reactjs) to simplify the integration of Prismic content into a Next.js app.
6. DatoCMS:
   1. DatoCMS is a headless CMS with a user-friendly interface for content management.
   2. It offers a Next.js integration guide that shows how to integrate DatoCMS content into a Next.js application.
7. GraphCMS:
   1. GraphCMS is a headless CMS that uses GraphQL for content delivery.
   2. You can use Apollo Client in your Next.js app to query and retrieve data from GraphCMS using GraphQL.
8. Netlify CMS:
   1. Netlify CMS is a Git-based CMS that allows you to manage content directly from your code repository.
   2. You can integrate Netlify CMS with a Next.js project and use it to edit and manage content stored in your repository.

When choosing a CMS for your Next.js project, consider factors such as your content management needs, ease of integration, scalability, and developer experience. Each CMS has its own strengths and may be better suited for specific use cases. Additionally, ensure that the CMS you choose offers the necessary APIs or integration libraries to work effectively with Next.js.