When it comes to collaborating on markdown notes in real-time, CodiMD is the top dog in town. Originally springing forth from HackMD’s robust source code, CodiMD lets you host and manage your team’s content with the kind of speed and ease that only comes from some good old-fashioned open-source goodness. HackMD's promise is simple yet powerful: you own and control all your content. This includes the ability to download all your online content en masse, keeping your formatting seamless (courtesy of markdown), and customizing your content's presentation with HTML, a slick slide mode, or even book mode. However, if you're leaning more towards open community use rather than commercial setups, CodiMD has got your back. CodiMD is the open-source twin of HackMD. Even though it comes without the fancy book mode, it’s still perfect for collaboration within open communities. Whether you’re brainstorming in a small group or rallying a large community, CodiMD ensures you have full ownership of your data. Plus, the HackMD team ain't holding back; they are committed to keeping CodiMD open source, actively welcoming all sorts of contributions. Kickstarting your journey with CodiMD is a breeze. If you’re in a rush to get things rolling, the Docker deployment option is your quick ticket. For those who like getting their hands dirty and contributing, manual deployment is your playground. The customization options are vast, covering aspects like networking, security, performance, resources, and more. And if you're thinking of moving from Etherpad or just upgrading to a newer version, detailed guides got that covered too. For developers itching to contribute, CodiMD’s documentation provides a thorough guide on everything from connecting to your own database to tweaking the project structure with webpack’s help. The doors to this community are wide open, ranging from bug reporting and feature requests to translation efforts and documentation improvements. There’s even a community chat on Gitter where you can ask questions and get involved. Browser compatibility isn’t a headache either. Whether you’re a Chrome, Safari, Firefox, Edge, or Opera fan, CodiMD has got pretty extensive support. They’ve even got mobile users in mind, with compatibility for Chrome for Android and iOS Safari. All in all, if you're looking for a solid, open-source platform to create, manage, and collaborate on markdown notes in real-time, CodiMD is your go-to solution. So, why not dive in, contribute, and become a part of this dynamic community? Happy collaborating!