Working with resource bundles in Flex is (surprise, surprise) relatively easy and pretty cool. They're a great way to separate content from code and localize your flex apps. You have the choice to either compile the different locales statically into the app, or load them dynamically using the ResourceManager.

If you are looking for code formatting tools for Flex Builder, scoot over to https://sourceforge.net/projects/flexformatter/ Ernest Pasour has built an excellent set of source code tools for Flex Builder.

This book aids intermediate and advanced ActionScript developers in learning how to plan and build applications more effectively. You’ll learn how to apply design patterns as solutions to common programming scenarios.