ActionScript 3 Coding Environment Options

At the most recent Boston Flash Platform User Group meeting, Keith Peters gave a talk about "Making Things Move in AS3." One of the main parts of his presentation was a discussion about the three options for getting started working with ActionScript 3:

1. Download the new Flash 9 AS3 Preview (free for Flash 8 users)
2. Purchase Flex Builder 2
3. Download the Flex 2 SDK (free), which is basically just a SWF compiler. Then, you can download the FlashDevelop IDE (free) and Apache Ant (free) to organize your project files and compile instructions. Keith has made available on his blog the templates he uses to structure his projects using this configuration.