Two Dots - Sharpen your puzzle solving skills with a challenging game of dot connection.
Total Validator - Total Validator can check your website to help ensure that it is accessible, uses valid HTML and CSS, has no broken links, and is free from spelling mistakes.
Who Can Use - WhoCanUse is a tool that brings attention and understanding to how color contrast can affect different people with visual impairments.
W3C Markup Validation Service - Validates HTML markup of web pages, one at a time.
Dood : The Puzzle Planet - A strategy puzzle game for the smart ones
Rocket Validator - Site-wide Accessibility and HTML validation made easy. With a single click, Rocket Validator will check thousands of web pages on your site for Accessibility and HTML conformance, producing a detailed, actionable report on seconds.