TooMuchLoot can modify any category registered in the game. Below are the standard vanilla categories available in 1.7.10:

• DUNGEON_CHEST: Found in standard 16x16 cobblestone dungeons.
• MINESHAFT_CORRIDOR: Found in Abandoned Mineshaft chest minecarts.
• PYRAMID_DESERT_CHEST: Found in the four chests at the bottom of Desert Temples.
• PYRAMID_JUNGLE_CHEST: Found in the hidden chests within Jungle Temples.
• PYRAMID_JUNGLE_DISPENSER: The loot inside the traps of Jungle Temples.
• STRONGHOLD_CORRIDOR: Chests found in the hallways of Strongholds.
• STRONGHOLD_LIBRARY: Chests found in Stronghold libraries (usually containing books/paper).
• STRONGHOLD_CROSSING: Chests found in the tiered crossing rooms of Strongholds.
• VILLAGE_BLACKSMITH: The chest found in the Blacksmith building in NPC villages.
• BONUS_CHEST: The optional chest that spawns near the player upon world creation.