Adobe Systems today announced the delivery of Adobe Flex Builder 2 for Macintosh, an extension of its toolset for designing and deploying a new class of rich Internet applications. The release of Flex Builder 2 for the Macintosh helps developers and designers build engaging Web applications that combine the benefits of desktop software with the reach of the Web. “The Adobe Flex 2 product line provides developers with a comprehensive, integrated set of tools and technology for fast, end-to-end development of rich and innovative Web applications. With the free license version of the Flex 2 SDK, developers have everything they need to build and deploy complete rich Internet applications with no software licensing costs.” The Adobe Flex 2 SDK, which includes the Flex framework and command line compiler, is available free of charge. Adobe Flex Builder 2 is available for an estimated street price of US$499, and Adobe Flex Builder 2 with Charting is available for $749.