InfoWorld has given high marks to Adobe Flex Builder 3.0, which is a commercial product. We would also like to honor Adobe for open-sourcing the Flex SDK (although not the Flex Builder IDE) under the MPL model. This move opens the door for open source tools and applications targeting the Flex framework, which in turn is one of our favorite ways of producing rich Internet applications. Competitors to Flex include OpenLazlo and better performers such as Curl and Silverlight 2.0, but those last two products are not open source, even though they may be used for free in some scenarios. FULL REPORT ...