Joe Hewitt has just released a Public Beta of Firebug 1.0. Firebug is a kick-ass tool that every web developer/designer must have in his or her toolbox. If you have used Firebug in the past you will absolutely love some of the new features like JavaScript profiling, live HTML and CSS editing, and CSS metrics visualiztion. My favorite new feature is the one that lets you open Firebug in a separate window (perfect for those of us with more than one monitor).

Jack Slocum has created an excellent reusable component for resizing elements. The component uses his custom version of the YUI JavaScript library and is very easy to include an use in your scripts. Be sure to scroll down his page to check out some very cool examples.

Ben Maurer has devised a simple JavaScript that will create a free/busy schedule using Google Calendar and JSON. This is perfect if you want to publicly make your schedule available while only giving details on whether you are free or busy.

Mootools is a small object-oriented JavaScript library that is crossbrowser compatible and easy to use. Some features include DOM effects, Ajax, DOM Navigator, drag and drop, sortable lists, cookies management and much more. The framework also makes it easy to extend HTML elements with your own methods, to help make your coding style way cooler.

One of the nicer features is the way you download mootools. You choose the features you want to use, and mootools packages a custom JS file that includes all dependencies. This makes mootools very small and efficient!

Jack Slocum offers some 3 Easy Steps to Avoid JavaScript Memory Leaks. This article offers three great tips and an overview of using Leak Monitor to detect places where your JavaScript may be leaking.

9 JavaScript Tips You May Not Know. Wow I didn’t know half of these!

Mike Arace shows us how to create a CSS Crossfader Demo using CSS, the Scriptaculous JavaScript effects library and a bit of semantic markup!

Low Pro is an unobtrusive scripting library build ton top of Prototype. It provides a bunch of neat methods that ease DOM manipulation and methods for easing the creation of nodes in the DOM.

Corunet presents The definitive heatmap where by using a combination of Apache, Ruby and JavaScript, you can create your own heatmaps to track where users are clicking on your sites. So this combination of scripts essentially give you the same results as CrazyEgg, however, by rolling your own solution you’ll probably learn something along the way!

Here is a nice two part interview with Alex Russell who is the creator of the Dojo AJAX toolkit. In Part I, Alex discusses the history and strengths and weaknesses of Dojo. Part II looks at AJAX challenges as well as competition to the Dojo toolkit.