See also:

• Computers: Internet: Web Design and Development: Accessibility  (163)
• Society: Disabled: Universal Design: Computers  (11)

• Accessibility Color Wheel - A tool to help choose a color pair with good contrast and suitable for text and background of accessible sites. It simulates also various kinds of color-blindness.
• Accessibility Extensions for Mozilla/Firefox - Toolbar to help users navigate pages, and also tools for developers to check their pages. Installation instructions and documentation.
• AIS - Web Accessibility Toolbar - Toolbar aids manual examination of pages for accessibility features. It consists of a range of functions that: identify components of a web page; facilitate the use of 3rd party online applications; simulate user experiences; provide links to references and additional resources.
• Anybrowser - screen size testing - Enables you to test how your page appears at low screen resolutions - e.g. webtv, 640x480, 800x600.
• AskAlice - Free report (registration required) provides an assessment of a site's accessibility, and information on how to improve.
• ATRC Web Accessibility Checker - Analyses a page for conformance with WCAG 1.0 and 2.0, BITV 1.0, Section 508, and the Stanca Act.
• Color Vision - by Cal Henderson - Test your website foreground/background colors for their contrast and clarity to color blind visitors.
• Color-Blind Design Evaluation - Online tool to show what your site colors look like to color-blind people.
• Colorblind Web Site Filter - View your actual web pages through the eyes of visitors with three different types of color blindness.
• Cynthia Says Portal - Accessibility agent offering validation for WAI standards and Section 508 compliance. Includes information and news from the Internet Society Disability and Special Needs Chapter.
• Erigami Accessibility and Quality Validation Tool - Checks web page accessibility on compliance with WCAG and Section 508, including automatic color contrast validation of text elements. It shows issues on a web page screenshot, measures response and download times of every element.
• GrayBit Grayscale Contrast Tool - Converts your page to greyscale to ensure there is sufficient visual contrast between elements.
• Juicy Studio: Colour Contrast Analyser - Uses the W3C algorithm to check for sufficient contrast between background and foreground colours.
• Lynx Viewer - Delorie online viewer enables you to view your site in a text browser.
• OCAWA Accessibility Validator - Standing for Operational Control and Analysis for Web Accessibility. OCAWA tests the accessibility of your web site using international accessibility standards.
• Q42 Color Blindness Check - View your website as someone with color blindness would. Appears to work only in IE. Bookmarklet available.
• UITest.com: Site Check - Test your website with the W3C, WDG, ATRC, WebAIM, WebXact, Bobby, Cynthia Says, HiSoftware, Site Valet, Colorblindness filter, and Google Viewer, simply by typing your site address once.
• Vischeck - Allows the user to see the world as color blind people see it. Checks by images and urls.
• Wave - Helps you check if your page is accessible to people with disabilities. New version includes tests for section 508.
• WAVE 3.0 Accessibility Tool - Online tool checks page accessibility, displays page with tags to show good and bad points.
• W3C CSS Validation Service - W3C CSS Validation service enables you to check your CSS code for validity, and warns you if you are using browser specific code.
• W3C HTML Validation Service - A free service from W3C that checks HTML and XHTML code against the W3C Web Accessibility Guidelines.
• Webnauts Net - Offer a combined interface to collection of tools (W3C, CSE, and Cynthia validators, and also a Lynx simulator) for checking adherence to standards, mark-up and accessibility.
• Webthing Accessibility Valet - This tool will examine your site, and based on the accesibility level you choose, will provide you with a source code listing with marks next to each element which requires attention.

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