FLEXible is out and doing well! After being challenged to release the code, I’ve spent roughly 2 weeks trying to flush this out to a somewhat usable application. The response has been awesome! I really appreciate the comments and input from everyone.
FLEXible is meant to be simple MXML design tool. You can use the constraints panel and switch between Source and Design views. It’s released under the MIT license and the source is available. If you want to join in the fun and help flush the rest of the application out, I’d love the help!