LinkMiner

LinkMiner takes broken link checking to the next level. You can now find out more about the links you're checking so you can make smarter decisions, quicker. Get link & social data on any link on a page, be able to export all links from a page, and even display link data next to each link on the page.

You can also utilize LinkMiner to find out how many total or external links are on the page you're viewing.

UPDATE 1.5: You can now toggle the LinkMiner on Google search result pages to find out various link metrics about each result (without having to click-through to that page).