WebTide HTML editor is a new free HTML editor. It is designed to help web developers in creating fast and professional websites. It is also a programmer text editor.
New features:

HTML context completion
PHP basic function completion
CSS context completion
JavaScript 2.0 completion
XML completion
CSS validation
JavaScript validation
XML validation
Project validation
Error undeline in the editor
Error stripe
Quick open project file
CSS formatting
JavaScript formatting
WebTide now integrates code completion for the following contexts:

HTML files - attribute completion shows only the allowed attributes in the current element
PHP files - basic PHP functions competion with function parameter insight. For the PHP competion there are 3 modes available for the parameters: Complete with guessed parameter names, Complete with the parameter's types or Don't complete the parameters at all. The PHP completion is also available in embedded HTML/PHP files inside the PHP processing context
CSS files - the CSS completion modules includes restricting the completion values to the current property values. The CSS completion is also available in the styles embedded in HTML or PHP files inside the CSS context defined by the style element.
JavaScript files - the JavaScript completion in JavaScript 2.0 compliant and it is only available in the .js files.
XML files - for XML files based on DTD and simple(non extended) XSD files
WebTide also integrates new validation and error underline engines for HTML, JavaScript, CSS and XML files. We have also switched to a faster editor component which should reduce the system requirements drastically.