The Link Checker plugin acts just like a spell checker, but instead of checking spelling, it will let you know if a link in the editor is valid, invalid, or questionable. This is a huge time-saver for anyone who creates content—no more having to double-check URLs, especially in imported content.
Link validation at your finger tips
If Link Checker thinks there is any possibility your link might not be valid, it will flag the link for you so that you can make an informed decision. Your content creators can choose to either keep or remove the link.
"Being able to know that we’ve made a good choice with TinyMCE - that we don’t have to worry about the editor, and can go on to focus on other things is so valuable. The open source background and history of TinyMCE, and how that’s been nourished by Tiny is awesome."