Parsley

Dynamic Objects and Commands 
http://artinflex.blogspot.com/2010/10/quick-dive-into-parsley-dynamic-command.html

Spring Flex integration with BlazeDS

http://www.jacobheric.com/2010/02/09/spring-flex-integration-with-blazeds/

Advanced Flex Components

Visit this URL:
http://flexcomponents.wordpress.com/

Flex Style Explorer: Generate CSS for you ..

This is very useful component while you want do some styling .. Happy flexing guys ..
http://examples.adobe.com/flex3/consulting/styleexplorer/Flex3StyleExplorer.html#

TabBar with close button

Visit this blog
http://ria.richtechmedia.com/2006/08/02/flex-2-component-draggable-tabbar-with-close-button/