Both Kibbles.Keys and Kibbles.Skipper are included in the featured kibbles download. If you plan on using both libraries, that's by far the easiest way to reference.

Kibbles.Keys

Kibbles.Keys provides a small cross browser library for keyboard shortcuts.

<script type='text/javascript'
    src='http://kibbles.googlecode.com/files/kibbles-1.3.0.comp.js'></script>
<script type='text/javascript'>

  function onLoad() {

    kibbles.keys.listen();
    kibbles.keys.addKeyPressListener(
        "a", function() {
            document.body.innerHTML = document.body.innerHTML + "a<br/>";
        });

    kibbles.keys.addKeyPressListener(
        "u", function() {
          window.location = 'http://code.google.com/p/kibbles/';
        });
  }

  window.onload = onLoad;
</script>

Kibbles.Skipper

Kibbles.Skipper provides a cross browser library for on page keyboard navigation. You can register an object as a 'stop', then using selected keys, navigate to each 'stop' in succession.

<script type='text/javascript'
    src='http://kibbles.googlecode.com/files/kibbles-1.3.0.comp.js'></script>

<script type='text/javascript'>

  // updates the style on the stop and clears the style on the previous stop
  function updateCursor(next, prev) {

    // remove our cursor style from the previous stop
    if (prev && prev.element) {
      prev.element.style.border = '';
    }

    // add our cursor style to the current stop
    if (next && next.element) {
      next.element.style.border = '1px solid red';
    }
  }

  function onLoad() {
    kibbles.skipper.addStopListener(
        kibbles.skipper.LISTENER_TYPE.PRE, updateCursor);

    // Set the 'offset' option to return the a third way down the client area
    // an option can be a static value, or a callback.
    kibbles.skipper.setOption('offset', function() {
        return document.documentElement.clientHeight / 3;
    });

    // Work your own magic to find a list of elements to use
    // use as stops, then register them with skipper.
    var nodes = document.getElementsByTagName("h1");
    for (var i = 0; i < nodes.length; i++) {
      kibbles.skipper.append(nodes.item(i));
    }

    // Finally register our keys.
    kibbles.skipper.addFwdKey("j");
    kibbles.skipper.addRevKey("k");

  }

  window.onload = onLoad;
</script>