I thought that since I had already written this all down for myself, I would share it for anyone who didn't want to miss a mat for their crafting trade. The following info is for crafting levels 1-75 only. I will provide another guide, if somebody else hasn't for the Skilled level as I get there.
Key: H - Harvested; P - Purchased; S - Salvaged; D - Drop
APOTHECARY
H-Grieveblossom Petals
H-Coastal Glory
H-Creeperbrush Roots
H-Razorbrush Leaves
P-Empty Glass Bottle
P-Empty Glass Flask
P-Low Grade Sulfur
P-Caustic Blend
P-Cloudy Extract
P-Vinegar Concoction
D-Rotting Canine
D-Cracked Rib
WEAPONSMITH
(Note: Bars and Planks are actually made by Mining and Foraging professions respectively from the raw mat)
H-Yew Plank
H-Tin Bar
H-Ashwood Plank
H-Copper Bar
H-Shimmering Opal
P-Sinew Cord
P-Unstable Flux
P-Course Grinding Stone
P-Creeperseed Oil
D-Burlap Cloth
D-Cotton Cloth
OUTFITTER
(Note: Leather is actually made from Hides by the Butcher Profession)
H-Soft Leather
H-Thin Leather
P-Course Thread
P-Bone Oil
D-Bolt of Burlap
D-Bolt of Cotton
ARTIFICER
(Note: Bars and Planks are actually made by Mining and Foraging professions respectively from the raw mat)
H-Tin Bar
H-Yew Plank
H-Copper Bar
H-Ashwood Plank
H-Moonstone
H-Sunstone
H-Shimmering Opal
H-Abyssal Opal
P-Unstable Flux
P-Cerulean Wax
P-Heat Stone
P-Animal Glue
P-Basic Polishing Agent
ARMORSMITH
(Note: Bars and Leather are actually made by the Mining and Butchering professions respectively)
H-Tin Bar
H-Soft Leather
H-Copper Bar
H-Thin Leather
P-Unstable Flux
D-Burlap Cloth
D-Cotton Cloth
RUNECRAFTER
(Note: Nearly all mats for Runecrafting come from the Runebreak ability granted to this crafting class, and are thus labeled as S for Salvaged)
P-Essence of Carmot
S-Uncommon Powder, upgrade with 3 powders:Uncommon Shard, upgrade with 3 shards: Uncommon Crystal
S-Sentience Spark, upgrade with 5 sparks:Sentience Surge, upgrade with 5 surges:Sentience Blast
S-Kinetic Arc, upgrade with 5 arcs:Kinetic Charge, upgrade with 5 charges:Kinetic Burst
S-Perpetual Blur, upgrade with 5 blurs:Perpetual Glow, upgrade with 5 glows:__________(missing this one)
And that about does it. Hope you don't throw away any of those drops now that you know what profession will need them. And I hope this helps anyone who wanted to know this information.