Word Highlighter lets you easily highlight important words in your WordPress site. It works globally for all posts, pages and other custom post types.
Marker.to is a simple and quick annotation tool which allows you to use a marker pen on web pages. Have you ever used highlighter over paper documents? It is as same as that but here it works online for web pages. Using this tool you can highlight important parts of any online news, post, article etc to share it with your friends so that they can easily find the lines you want to show them.