Halo 2 RSS Reader
Dubbed "War Room", the Halo 2 RSS reader is a great example of the ease and efficiency of development that Flex provides. I created this app in a few hours within the first few days of learning Flex. It is simply a web app that takes an RSS feed from Bungie.net of a particular Halo 2 player’s game stats (any player that you enter, not just yours), and spits out their recent game history using a Flex front-end. Nothing horribly complicated, but makes use of states as well as web services. Take a look at the program and look at the code to see for yourself.
Flickr Photo Viewer
A very simple Flex application that features both the strength of the webservices as well as the visual elements built into Flex. Using Flickr's REST API, this Flickr Photo Viewer is written comfortably in under 50 lines of code!
Transitions & Effects Demo
One of the most compelling reasons to try developing rich-internet-apps with Flex is the amount of visual richness with very little code. There are a slew of visual effects that you can add to your project with sometimes only a single line of code! I've created a simple sandbox where you can play with some of them. I show some very simple transitions and effects as well as some more complicated ones (although still very easy to reproduce). Play around in the sandbox and take a look at the code to see how easily it was all done.
Transitions & Effects Sandbox (demo, source)
Containers
Almost equivalent to a "Hello world!" example, the Containers Demo is very elementary. Although it is so simple, containers are so important that I think they still deserve a sample sandbox. Here is a rudimentary demo of containers in Flex (for a more comprehensive look at containers, and other components, see the Flex 3 Component Explorer!).
