"VMware is announcing the release of large portions of VMware Tools
for Linux, Solaris and FreeBSD guests under GPL and GPL-compatible
licenses. VMware is also announcing the creation of the Open Virtual
Machine Tools ("open-vm-tools") project on Sourceforge.net. This will
become the home for ongoing development."

http://open-vm-tools.sourceforge.net/faq.php

Yes, it's GPL and not BSD. But maybe in the future an OBSD client
won't need FreeBSD emulation.

Best
   Martin