• Dalaran Wizard Outfit
• High Inquisitor Whitemane in
  • Dark (Black)
  • Normal (Red)
  • Purple
  • Blue matching hat
• Cool robes
  • Scarlet Initiate Robe
  • Arachnidian Robes

• Chef's outfit
• Knight's Outfit

• Purple tank top + spring dress

Slutty outfits for female toons (http://www.wowhead.com/?forums&topic=102547&p=1158483):
RP Outfit spreadsheet (http://www.wowhead.com/forums&topic=92384):
Plate quest rewards in Nagrand: http://www.wowhead.com/?compare=25569:25585
Plate lvl 56 "Glorious": http://www.wowhead.com/?compare=14968:14974:14966:14967:14969:14970:14972:14971
Plate lvl 52 "Lofty": http://www.wowhead.com/?compare=14923:14924:14928:14922:14929:14927:14926
Plate lvl 49: http://www.wowhead.com/?compare=10845:17711
Plate lvl 43 "Tyrant": http://www.wowhead.com/?compare=14834:14838:14835:14841:14833:14839:14840:14842

Robes of Insight (Slave Leia): http://www.wowhead.com/?item=940
Similar model in blue for Celeira: http://www.wowhead.com/?item=21663
Pink: Vestments of the Shifting Sands (AQ20, Kurinnaxx)
Blue: Robes of the Guardian Saint (AQ40, Fankriss the Unyielding)
Greenish: Robes of the Triumverate (AQ40, Bugtrio)
Orange: Robes of the Battleguard (AQ40, Battleguard Sartura)
Yellow: Robes of Insight (World drop)