It's compression ratio is around 50% which is great plus it's incredibly easy to use.
http://eotfast.com/
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$('#book2').hide(); //Initially hide the div
$('#clickme2').toggle(function() {
$('#book2').fadeIn('slow', function() { }); //END FADEIN
}, function() {
$('#book2').fadeOut('slow', function() { }); //END FADEOUT
});// END TOGGLE
}); //END READY
</script>
<div id="clickme2">
<a href="#">Click here for toggle</a>
</div>
<div id="book2">Toggle is very cool!</div>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$('#book').hide(); //Initially hide the div
$('#clickme').click(function() { //If click occurs process what's inside
$('#book').fadeIn('slow', function() { // Do a fade in
// You can perform aditional actions on fade in by placing code here
}); //END FADEIN
}); //END CLICK
}); //END READY
</script>
<div id="clickme">
<a href="#">Click here</a>
</div>
<div id="book">Hello World!</div>