Linux
Sun's gnu/linux offerings
http://wwws.sun.com/software/linux/index.html
Solaris for Sparc Platform
Solaris operating system - be brilliant faster
http://wwws.sun.com/software/solaris/sparc/index.html
Solaris for x86 Platform
Solaris operating system - be brilliant faster
http://wwws.sun.com/software/solaris/x86/index.html
Trusted Solaris
Extends the capabilities of the solaris operating system to provide superior safeguards against internal and external threats beyond the protection commonly found in standard operating systems.
http://wwws.sun.com/software/solaris/trustedsolaris/index.html