Transmog

Custom Outfits for Druids

Tier Picks and Matching Accessories for Druids

NPC Roleplaying Outfits for Druid

Class Specific Outfits (minus druids)

Resources:
Icy-vein's Transmogrification Guides
     Great site that has interactive pictures of every model available to the class. Includes PvP/tier models, look-alike tier, weapons and greens. The site is missing a few pieces, so if you can't find what you are looking for, check out Wowhead too.  This is my current favorite site for transmog needs.
World of Wardrobe
     A fun site that sorts pieces by material and color.
Wowhead
     Now has a search engine that shows sets by color. Can be filtered to make searching easier. Also, wowheadnews.com has some creat articles about transmog that include tier, look-alike items and unique items.