This is the software publisher's description.
Adobe Dreamweaver software is the ideal tool for web designers, coders, and application developers of all levels. Enhanced coding functions make it a breeze to navigate through complex site pages at design time. Improved layout tools bring expedited workflows, from comp conception to client approval. Innovations throughout the Dreamweaver beta can help teams and individual developers alike reach the next level in performance and functionality. Download the pre-release of the next version of Dreamweaver now and send us your feedback. The Dreamweaver beta will expire soon after the next version of Dreamweaver is available for purchase.
New features include a live preview mode, so you can see how your web page will appear in different browsers. There is a related files option, so you can see files that relate to a particular web page. There are many other code-related improvements as well as a brand new user interface that looks very different from the current (CS6) interface.
Note that the download here will install the Adobe Download Manager. From here, you can use the tool to download any CS6 trial. You wil need an Adobe account to download your trials.