How many of them there Micro libraries are there?!

gistfile1.js

//Run this in the console at http://microjs.com to see how much it would weigh if you used 'em all! ;D

var theSizes = document.getElementsByTagName("div");
var total = 0;
var incorrectClass = 0;
var i = theSizes.length;
var current;

while (i--) {
    if ( theSizes[i].className == "size" ) {
        current = theSizes[i].innerHTML;
        total += parseFloat(current.substring(0, current.length -1));     
    } else {
        incorrectClass ++;
    }
}
console.log(theSizes.length - incorrectClass + " micro frameworks & libraries weighing an underwhelming total of " + total.toFixed(1) + "k!")