Such as those listed here:
http://demonmagnet.com/elitistforum/...pic.php?p=4782
In case you haven't heard of them, they're mods that prevent useless or irrelevant UI checks from happening, DRASTICALLY reducing loadtimes for instances, zepplins, etc, down to a handful of seconds.
Seriously, why is the WoW UI so amazingly inefficient? Before, I had no idea this was even possible, so I couldn't complain. Now that players are coding mods that drop Blizzard's loadtimes by a factor of ten, it makes it clear how sloppy they can be.
Why the fuck isn't this standard code? Or even a toggle or slider in Interface Options for us? Apparently some mods bug out when running these, but the Catalyst one is supposed to be totally bug-free, and personally I'd hope Blizzard could do better than a mod coded in some unpaid WoW player's free time.