Today, the major "hobby" Operating Systems are
AtheOS (which is currently
stalled),
MenuetOS and SkyOS. Without doubt,
SkyOS is the one that moves with the faster pace. Since our
interview back in October (and the subsequent Slashdoting), Robert Szeleney has put all his free time on the (270,000 lines of code) project. He wrote a media player, the
documentation for SkyOS, more device drivers and applications, networking, SkyFS, the ability to boot from a CDRom and install on a native partition, speed optimizations, some basic Linux emulation (without having SkyOS to be a UNIX) and much more. Robert expects SkyOS 3.6 (binaries and source
under the GPL) to be ready for public consumption in the next few weeks.