 The FreeBSD project includes a security team overseeing all software shipped in the base distribution . A wide range of additional third @-@ party applications may be installed using the pkgng package management system or the FreeBSD Ports , or by directly compiling source code . Due to its permissive licensing terms , much of FreeBSD 's code base has become an integral part of other operating systems such as Juniper JUNOS and Apple 's OS X. 
