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.