Extending Your Script Execution Time
jquery-ahm is a replacement for $.ajax. With $.ajax, every ajax request needs a callback, resulting in a lot of javascript. $.ahm reduces javascript code by letting the response data define the actual callbacks.
JSJaC is a jabber client library written in JavaScript to ease implementation of web based jabber clients.
Deadweight is RCov for CSS, kind of. Given a set of stylesheets and a set of URLs, it determines which selectors are actually used and reports which can be "safely" deleted.