A Belgian developer
has ported parts of the OpenBeOS/BeOS toolkit and API to Windows. This is
not the first time something like this is being done, but possibly it is the most advanced of the efforts. This is also similar to what the
B.E.O.S. team does, trying to port the BeOS API to Linux.
Update: Xentronix project leader seems to
have stop developing BeOS apps and the Sequel OS, citting personal reasons.