High-end Web site development tool. It also boasts a template feature which is very useful for producing multi-page Web sites using a standard layout. (Mac & Windows)
Easy to learn Web site editor - ideal for maintaining existing sites. Recommended for users that do not require the flexibility, as well as the learning curve of Adobe DreamWeaver. (Mac & Windows)
One of the most powerful Windows text editing applications. (Windows)
A very popular Macintosh text editor (Mac)
A freeware version of BBEdit (Mac)
A powerful text editing application (Mac)
Detailed text report of errors, including testing by different levels of compliance. Section 508, WCAG Priority 1, etc, and browser emulation
Markup on your Web page accessibility errors and element markup.
Verify that your HTML code meets the current standards.
Use this application to correct common HTML syntax errors.
Test and debug your code with this handy plugin.
Test how your Web site looks with a text-only web browser.
Use the World Wide Web Consortium's website as a starting place for all accessibility and compliance information.
Useful information for making your website accessible to everyone.
Test images for visitors to your Web site who are color-blind.
Edit photos quickly and easily right from your browser! Optimize images for easy downloading.
Adobe's popular high end, full-featured image editing application. (Mac & Windows)
Adobe's more affordable version of the Photoshop image editing application. (Mac & Windows)
The Industry-leading vector-based drawing application. (Mac & Windows)
Simple yet powerful image organization, plus easy-to-use editing features. (Mac)
A desktop application from Google, offering similar functionality to iPhoto for Windows users. (Windows)
Verify that your HTML code meets the current standards.
Use this application to correct common HTML syntax errors.
Adds a menu and a toolbar with various web developer tools to Firefox. Test your site without images, CSS and more.
Test how your Web site looks with a text-only web browser.
Use the World Wide Web Consortium's website as a starting place for all accessibility and compliance information.
Test your website for ADA compliance (Web Content Accessibility Guidelines 1.0 and U.S. Section 508 Guidelines)
An online magazine for cutting-edge standards-based design.
The Web Standards Project is a grassroots coalition fighting for standards which ensure simple, affordable access to web technologies for all.
Daily musings and resources from the Web standards evangelist Jeffery Zeldman.
Wikipedia's CSS entry
A great online resource from a CSS expert
A collection of CSS design tools and tricks
A CSS design blog
Wikipedia's AJAX entry
A great resource for code, news and information about AJAX
New Wave Javascript: lightweight AJAX framework