|Author||Marcus Comstedt and the NetBSD team|
NetBSD is a powerful, UNIX-like operating system that was ported to Dreamcast. Earlier versions of NetBSD for Dreamcast were partially maintained by SEGA employees. NetBSD for Dreamcast is an official port of NetBSD and includes BBA support, Video Support and Keyboard support. At the moment the Dreamcast port of NetBSD is maintained by Marcus Comstedt, who is a very well known face in the scene.
A ready-to-burn ISO image can be found here.