Shantanu's Addons

AtlasLoot -- shows you all the loots at all instances in wow and also pvp rewards, tier sets and reputation rewards.
Bagnon-- open all your bag in one large single bag,informs you of the number of items in bag and bank.
Cartographer-- For navaigation and a completely visible WOW map
DamageMeters--To know damage and healing done in raids.
eCastingBar-- lets u see the spell you are casting the delay that will occur due to a hit and also the casting bar of your selected target friendly/enemy
Grid-- not too useful can be used in raids
MobInfo2-- provides info about the mob
Omen-- Threat meter, can be used to manage threat but not sure if it works properly
OnScreen-- Not sure should be related to providing warning of any enemy spells or abilites around you
PerfectRaid-- useful in raids
sct- damage heal or abilities come as a scrolling text.
sctd
SellJunk-sells all junk items in your bag at one go.
SpellAlertSCT