For a fully customizable web chat software try open source AJAX Chat which is implemented in JavaScript, PHP and MySQL. AJAX Chat features: multiple channels, private messaging and channels, invitation system, banning offending users, online users, emoticons, optional Flash sound support, clickable hyperlinks, enable/ disable guest users, possibility to define

AutoComplete is a very handy feature for text boxes and other input fields. If you use MooTools, try AJAX Daddy’s MooTools Autocompleter widget. This widget creates a suggestion box for input fields. You can get your suggestions from variable data sources, such as a local object or via XHR from