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A pet selection addon that lets you pick from a list like your mounts. There's an optional "AutoSummon" Setting to bring your buddy back after you die. Plus you can have them say witty things each time they are spawned.
To dismiss a pet, you can Right-Click their picture.
type /kpets to bring up the options.
At the moment it's not movable, so it may be incompatible with some UIs, by being placed under items.