The FreeBSD project produces a freely available, multi-platform Unix like operating system for Intel compatible (x86), DEC Alpha, and PC-98 systems. It is based on the original Berkeley Software Distributions (BSD) code distribution.
 Oracle support
Oracle Corporation does not officially support the Oracle database or any other of their products on FreeBSD. However, there is a vibrant group of users dedicated to making Oracle work on the FreeBSD platform. For some valuable resources, look at the external links below.
Generic BSD and FreeBSD resources:
Oracle on FreeBSD resources: