KompoZer is a complete web authoring system that combines web file management and easy-to-use WYSIWYG web page editing.
KompoZer is designed to be extremely easy to use, making it ideal for non-technical computer users who want to create an attractive, professional-looking web site without needing to know HTML or web coding.
FireScope is a Firefox add-on that integrates with Firebug, to extend it with reference material for HTML and CSS. The extension's core functionality is centered around a new Reference panel, which contains a search tool for looking up HTML elements, attributes, and CSS properties.
This is a REAL odometer style javascript counter, where you can actually see the numbers spining. No Flash, it's all css and javascript. It can serve multiple purposes, like a live visit counter or a cashier style counter on a shopping website. Well, anything that involves updating a numeric value dynamically. It can also be used a fixed counter, like the one you can generate with a server script, but of course that isn't nearly as much fun as updating it in real time.
NVU - Finally! A complete Web Authoring System for Linux Desktop, Microsoft Windows and Macintosh users to rival programs like FrontPage and Dreamweaver. Nvu (pronounced N-view, for a "new view") makes managing a web site a snap. Now anyone can
Blueprint is a CSS framework, which aims to cut down on your CSS development time. It gives you a solid CSS foundation to build your project on top of, with an easy-to-use grid, sensible typography, and even a stylesheet for printing.