CodiMD is an open-source real-time collaborative markdown editor. It allows multiple users to edit markdown documents simultaneously and see each other's changes in real-time. Markdown is a lightweight markup language that is easy to read and write, and CodiMD provides a convenient platform for collaborative editing and document sharing.

CodiMD is designed to be user-friendly and intuitive, providing a simple and clean interface for creating and editing markdown documents. It supports various markdown features such as headings, lists, links, images, code blocks, and more. Users can also preview their markdown content in real-time, making it easier to see how the final document will look.

One of the key features of CodiMD is its real-time collaboration capabilities. Multiple users can access and edit the same document simultaneously, and their changes are synced in real-time. This makes it an excellent tool for team collaboration, allowing users to work together on documents, take notes, brainstorm ideas, and more.

CodiMD can be self-hosted, meaning you can install it on your own server or use a hosted version provided by an organization or service. It is built using web technologies such as JavaScript, Node.js, and WebSocket for real-time communication.

Overall, CodiMD is a versatile and powerful tool for collaborative markdown editing, making it easier for teams to work together on documents and share ideas in real-time.