The RIALogger is an AIR application that harness the power of the Flex logging Framework. Its comparable to the older Flex Trace Panel, XPanel and now the newer RedBug, XRay, and other trace viewers.
The RIALogger is different in some regards and focuses on logging (not object introspection/debugging). The RIALogger receives its messages through the use of the custom RIALoggerTarget found in the renaun_com_Logger.swc (in the bin folder of the zip file) library.
Some of the different features is the ability to identify the messages which allows for multiple log sessions with in the same application. I use this heavily as I am usually testing multiple applications communicating with each other or want to test different user sessions within a particular application.
You can read more about the here.