Google Libraries API

O Google Libraries API permite carregar, remotamente, bibliotecas JavaScript.

Dentre as libraries estão:

Dojo
Ext Core
jQuery
jQuery UI
MooTools
Prototype
SWFObject
Yahoo! User Interface Library (YUI)
WebFont Loader

Exemplo de carregamento da biblioteca Jquery:

<script 
   type="text/javascript" 
   src="https://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js">
</script>