I didn't like gleeBox, so I used Keyboard Navigation for Chrome. However I disliked that it searches for links on the whole page (scrolling to top if needed), but when you want to "click" a link with keyboard, you only want to search inside visible links, so I modified it a bit.

You can see a little demo here: http://www.youtube.com/watch?v=z3ZrUMzBoPI

(note that I changed ESC to focus to Ctrl+ESC in the latest revision)

I haven't packaged it as extension yet, so you'll have to install the original one first https://chrome.google.com/extensions/detail/jdfpnijdiejbheba... then cd into the folder with this extension and pull changes from my fork: http://github.com/dchest/keyboard-navigation-for-chrome