All merchants in The Legend of Zelda: The Wind Waker

Every merchant and trader the guide lists, with where they are and what they sell.

Merchant	Area	Sells
Beedle's Shop Ship	Outset Island	Bait Bag, All-Purpose Bait, Hyoi Pears
Orca	Outset Island	Offers sword training to teach basic combat moves and gives the Hero's Sword
Zunari	Windfall Island	Sail
Beedle's Shop Ship	Dragon Roost Island	Bait, Bombs (later), All-Purpose Bait, Hyoi Pears
Old Man (Fishman)	Star Island	Paints the sea chart for Star Island and provides hints about the area in exchange for All-Purpose Bait
Fishman	Seven-Star Isles	Chart information for Seven-Star Isles
Fishman	Diamond Steppe Island	Sells island chart information and hints for All-Purpose Bait
Beedle's Shop Ship	Pawprint Isle	Sells Bait, All-Purpose Bait, and Bombs
Beedle's Shop Ship	Greatfish Isle	Arrows, Bombs, and Bait
Fishman	Headstone Island	Provides hints about the giant stone face and the Earth Temple in exchange for All-Purpose Bait.
Fishman	Angular Isles	Provides hints and fills in the Sea Chart for Angular Isles when fed All-Purpose Bait
Loot	Boating Course	Mini-game where Link navigates an obstacle course for 30 Rupees per attempt, offering varying Rupee rewards depending on performance
Great Fairy	Thorned Fairy Island	increases arrow-carrying capacity from 30 to 60 (or up to 99 depending on visit order)
Traveling Merchant	Bomb Island	Offers the Bronze Feather in exchange for a Sea Companion's Crest as part of the trading sidequest

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