Marave is a distraction-free editor with a full screen interface. Most of the time, you will see no interface at all, except your text. It supports live spell-checking, background music, keyboard feedback, and more.
Open source project that offer summary and download services on this page is a project that carry out their development work on other open source development sites. Their work is linked to this page via a feature called OFI, and their work is not carried out here on OSDN site.