Kata Chess is a system of basic chess positioning and movement exercises much like in karate or judo. Kata Chess focuses on pattern recognition by using a unique point and click interface. This is a serious training system for chess players who want to quickly and easily improve their game.

CSE HTML Validator Professional is a fast, powerful, user configurable, and easy to use web development tool that helps you create syntactically correct and accessible HTML, XHTML, and CSS documents. Can automatically fix HTML and XHTML. A must-have for professional and serious HTML developers and business website owners. Supports HTML, XHTML, CSS, WML, accessibility checking, link checking, batch processing, integrated editing, and much more.

CSE HTML Validator Lite is a fast, easy to use, and FREE (for personal and educational use) HTML development tool for Microsoft Windows that helps you create problem-free HTML and XHTML documents. CSE HTML Validator will help you locate and fix HTML problems so that your documents are easily viewed by a variety of web browsers. It's also a great learning tool. Try it and you'll be surprised how many problems may exist in your web documents!