If you're in the market for a blog boilerplate that's integrated with a headless CMS and supports markdown and MDX, Shipixen could be a great option. It's a customizable SEO-optimized Markdown blog built with Next.js 14, TypeScript, TailwindCSS, and Shadcn UI. With automatic dark mode support, a lot of customization options, an MDX blog, and integration with Vercel for easy deployment, Shipixen is a powerful option for bloggers and developers.
Another option worth considering is Outblog, a Next.js boilerplate for setting up a blog as fast as possible. It combines Next.js with Tina CMS for a drop-in experience, supporting markdown and MDX. Outblog also includes support for SEO optimization, AI-generated content, and automated sitemap generation, making it a good option for startups and SaaS companies that want to get a strong online presence up and running quickly.