HubPages has been updating the site with new layouts. If you go to a hub that is under the technology topic -
look on the upper left hand side of the screen (on the edge of the page, left of the title) you will see a vertical black side tab that says, SHARE.
Simply click that and you will have the option to share with HubPages followers, pin on Pinterest, Google+ or 'like' on Facebook.
Incidentally, the share button is also on the left edge for recipe layouts.