In WordPress 3.5, the Link Manager (which some use to build blogrolls) will
be disabled by default. If you have links when you update, it’ll still be there.
But you can use this plugin to ensure it will always be there, even if you
update to a later version of WordPress or remove all of your current links.
Links widget is missing in wp-admin of wordpress 4.4.2
Even though this plugin has not been updated in quite a while, it works quite well in 4.4.1 wp.