CSS (Cascading Style Sheets) is a stylesheet language used to describe the presentation of a document written in a markup language (like HTML or XML). Most commonly, it is used to style web pages.

Quickly and easily design, develop, and maintain websites and web applications — from start to finish — with Adobe Dreamweaver software. Built for both designers and developers, Dreamweaver offers the choice of working in an intuitive visual layout interface or a streamlined coding environment.

Expression Blend breaks down the barriers between design and development that have historically slowed the development process to maximize the opportunities for synergy between design and development. Expression Blend enables you to iterate and deliver on your ideas faster, creating powerful and refined solutions for the web. SketchFlow will revolutionize your speed from concept to production by allowing you to add all the interactivity, animation and transitions without writing code.

Adobe Flash Professional software is the most advanced authoring environment for creating rich, interactive content for digital, web, and mobile platforms. Create interactive websites, rich media advertisements, instructional media, engaging presentations, games, and more. Designers and developers working on both Macintosh and Windows systems depend on Flash and the ubiquitous Adobe Flash Player software to ensure their content reaches the widest possible audience.

ActionScript is a scripting language based on ECMAScript. ActionScript is used primarily for the development of websites and software using the Adobe Flash Player platform.

HTML (HyperText Markup Language) is a programming language used to design websites. It provides a means to describe the structure of text-based information in a document — by denoting certain text as links, headings, paragraphs, lists, and so on — and to supplement that text with interactive forms, embedded images, and other objects. HTML is written in the form of tags, surrounded by angle brackets.

XHTML (Extensible Hypertext Markup Language) was developed to enhance HTML. HTML is a good markup language that has served the web well but at a certain stage, innovations planned for the web required more of HTML. Thus, in 2000, XML rules were added to HTML to beef it up. The result, XHTML 1.0, retains almost all of HTML 4.01. From a markup perspective, all the elements and attributes remain the same. This continuity from HTML into XHTML is key because it means that XHTML is backward-compatible when written correctly.