There are a great set links for free development tools (validation services, browser toolbars and plugins) posted on the Web Access Centre Blog today:
Looking for alternatives to Bobby and WebXact? Try these!
Anyone familiar with accessibility should already know about Cynthia Says and a few of the web-based validation services… what I was impressed with were the links for the browser add-ons, specifically the Web Accessibility Toolbar for IE. It’s very similar to Chris Pederick’s popular Web Developer Toolbar extension for Firefox (which I use religiously), and is a nice upgrade from Microsoft’s ho-hum IE Developer Toolbar. Lastly, Jon Gunderson’s Firefox Accessibility Extension is another great Firefox add-on.
Check out the other links mentioned in the blog post, and the Web Access Centre’s site when you have time.