Adobe® Dreamweaver® CS6 web design software provides an intuitive visual  interface for making and editing HTML websites and mobile apps. Use  fluid grid layout designed for cross-platform compatibility to create  adaptive layouts. Review designs with Multiscreen Preview before  publishing.
See the top new features in Dreamweaver CS6Find out more about fluid grid layout, enhanced jQuery Mobile support,  CSS3 transitions, and other features introduced in this latest version  of the leading software for designing and editing websites and mobile  apps.
Build online businessesDevelop complex e-commerce sites without writing any server-side code by  integrating with the Adobe Business Catalyst® platform (available  separately). Set up and host free trial sites.
Streamline productivityDesign, develop, and deliver websites and mobile apps efficiently with  faster FTP transfers and improved image editing. Build mobile apps with  updated support for jQuery Mobile and Adobe PhoneGap™ frameworks.
Transfer large files more efficiently with improved FTP performance in  Adobe® Dreamweaver® CS6 software. Updated Live View and Multiscreen  Preview panels render HTML5 code so you can check your work.
Fluid grid layoutCreate cross-platform and cross-browser-compatible web designs using the  CSS3-based fluid grid layout system. Work faster and more efficiently  as you develop projects using clean, industry-standard code for a wide  range of devices and computers. Visually construct complex web designs  and page layouts without getting buried in code.
Improved FTP performanceSave time uploading larger files with the reengineered multithreaded FTP  transfer tool. Upload site files faster and more efficiently to speed  production time.
Adobe Business Catalyst integrationUse the integrated Business Catalyst panel in Dreamweaver to connect and  edit sites you build with Adobe Business Catalyst (available  separately). Build e-commerce sites with the hosted solution.
Enhanced jQuery Mobile supportBuild native mobile apps for iOS and Android platforms using updated  support for jQuery Mobile. Build apps to reach mobile audiences while  streamlining your mobile development workflow.
What is new in version 12.1 build 5949
Quote:
This Dreamweaver update offers expanded  support for HTML5 with improved Forms, additional Semantic element  support and new HTML5 Audio/Video controls in the Insert Panel. In  addition, an overhauled Insert Panel provides a more meaningful and  organized workflow, with some dialogs such as Tag Editor and TagChooser  having been removed – without taking away the functionality.
We also invested heavily in developing a streamlined workflow with Edge  Animate. Designers will now be able to import their HTML5-based  compositions directly from Edge Animate into Dreamweaver, thereby  creating a clear path between the two applications.
Finally, enhancements to the Properties Inspector make adding HTML5  video and audio easier than ever. A more streamlined User Interface,  containing fewer dialogs for new workflows and functionality, offers  non-intrusive editing experiences.
- Intel® Pentium® 4 or AMD Athlon® 64 processor
- Microsoft® Windows® XP with Service Pack 3 or Windows 7 with Service  Pack 1. Adobe® Creative Suite® 5.5 and CS6 applications also support  Windows 8.
- 512MB of RAM
- 1GB of available hard-disk space for installation; additional free  space required during installation (cannot install on removable flash  storage devices)
- 1280x800 display with 16-bit video card
- Java™ Runtime Environment 1.6 (included)
- DVD-ROM drive
- QuickTime 7.6.6 software required for HTML5 media playback
- This software will not operate without activation. Broadband Internet  connection and registration are required for software activation,  validation of subscriptions, and access to online services.* Phone  activation is not available.
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http://www.adobe.com/products/dreamweaver.html