OpenBeOS - binary
compatible with beos (renamed to "Haiku")
BlueEyedOS - source
compatible with BeOS and linux
fork with BeOS aspirations
beunited.org - news about
beos clones, and plans to sell beos clones (?)
BeFree - source compat, which
may be broken in future releases. Runs overtop of FreeBSD and Linux.
Doesn't use X11.
Dano and PhOS are probably illegal