mQueueViewer
Displays all queues you're currently in — Dungeon Finder, individual Raid Finder wings, Battlegrounds/Arenas, Group Finder applications, and Pet Battle PvP — in a single panel. An always-on pill shows the active queue count and expands the panel on click.
Each row lists the instance name, role fill (tank/healer/dps as filled/required, e.g. 2/18), time waited, and the server's average wait.
You can leave most queues directly from the panel, including a single Raid Finder wing without affecting others; PvP queues are view-only because WoW's leave API for them is protected.
When an instance pops, a bar in the status area counts down the accept window.
Enjoy!