WowAce

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Cartographer_Trainers

A tool to appraise, estimate, or judge your equipment against the equipment of others.

Displays a grid of guild ranks versus permissions.

Jigsaw

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Kenzo is a skin for Masque

Embeddable chat throttling library with traffic shaping and priorities

DreamChat

Displays the zone level ranage of the zone you are in and also gives you a suggest zone and instances to be in.

Adds options to create customized layouts from within grid.

KillingSpree

Fires events whenever a raid member "fails".

Test whether the player can really dispell a buff or debuff, given its talents.

Clean looking square minimap with many options.

Lightweight time display, with micro menu and memory usage tooltip.

Fancy up the ExtraActionButton frame

FuBar_BongosFu

FuBar_PetInFu

Square Minimap and more