Here is an actor that will display all IMAQ images in memory, intended as a debugging tool.

Can be run standalone (run the Actor.vi) or launched from an application.
The core function is in "All IMAQ Images in Memory" subVI, for those who don't use Messenger Library.
Original Conversation: https://lavag.org/topic/21937-q-how-to-list-all-imaq-images-in-memory/?tab=comments#comment-135009