Adobe flex SDK helps you to create rich internet applications based on the adobe flash platform.It has lot of features like drag and drop support,mxml..etc.We can see lot of useful components in Adobe Flex Builder.Sometimes we need few custom components for out requirements.
You can find some more useful components in Flexlib.This project is a community effort to create user interface components for Flex 2,3,4 versions.
You don’t want to worry about how to use these component’s because this project is well documented and source code also available.I tried few components like SuperTabNavigator..etc.You can find following components in flexlib.
You should use correct version(zip file) flexlib for your flex applications.For example if you are using flex 4 application then you should use flexlib 4 lib otherwise it will create some problems.