So you want to set-up a new website and have chosen to use a content Management System (CMS). The question is "Which CMS do I use?" Good question and to be honest, one that is not easy to answer. Essentially it depends on what you want from the CMS, both short and long term.
Most website have links to external websites and many with links to bookmarking/sharing websites. With both of these, icons are often used to represent a link to an external site and the websites themselves.