We could see lot of useful flex components in Adobe Flex Builder but for our projects we need some custom components like AutoCompletionCombobox,AdvancedForm,TabNavigator with additional features,TreeGrid…etc.I used few of the custom components in flex and I would like to share the same to you.
1. FlexLib
Flexlib is a open source flex component library.It provides some useful user interface components for Flex 2,3,4 versions.
2.Flextras
Flextras is an another good site to download Flex Custom components.Here you will components like AutoCompletionCombobox ..etc.
3.Flex Examples
Here also you can find lot of flex examples for different flex components.