The MPL was adapted by others as a license for their software ; for example Sun Microsystems used the Common Development and Distribution License for OpenSolaris , the open source version of the Solaris 10 operating system , also by Adobe , as the license for its Flex product line . The MPL has been adapted by others as a license for their software , most notably Sun Microsystems , as the Common Development and Distribution License for OpenSolaris , the open source version of the Solaris 10 operating system , and by Adobe , as the license for its Flex product line .