From Curuxa Community
Main Boards are simple electronic circuits which contain a microcontroller, a connector for programming the microcontroller, and a bunch of headers for plugging Modules to the Main Board.
These custom Main Boards have been built by the community of users, they are not part of Curuxa official releases, but they all have been made available under free licenses on this website. You may also be interested in the official Curuxa Main Boards.
No one has published a custom Main Board yet!!. You can be the first one.