Edge allows developers to use an interface and features similar to those of Adobe's proprietary Flash Professional tool to develop Web content using native Web standards.
Techopedia explains Adobe Edge
Edge was released in 2011 as a free preview that could be downloaded from the Adobe Labs website. As of February 2012, Edge was in its fourth preview version.
Edge allows developers to create new content, animate text and import existing graphics for animation.
Versions of Adobe Edge are available for both Windows and Mac platforms. Content created with Edge will run on both PC browsers and mobile devices.