I'm surprised this hasn't been done before. Btw, this is taken directly from the List of power-ups page on the wiki in addition to some things from Super Mario Sunshine that are still items.
In Danger:
Super Mushroom
Fire Flower
Super Star
Super Leaf
Frog Suit
Tanooki Suit
Hammer Suit
P-Wing
Super Flower
Cape Feather
Power Balloon
Carrot
Wing Cap
Vanish Cap
Metal Cap
F.L.U.D.D.
Hover Nozzle
Rocket Nozzle
Turbo Nozzle
Power Flower
Mario's Cap
Luigi's Cap
Wario's Cap
Ice Flower
Copy Flower
Mix Flower
Blue Koopa Shell
Mini Mushroom
Mega Mushroom
Mega Star
Bee Mushroom
Boo Mushroom
Spring Mushroom
Red Star
Rainbow Star
Propeller Mushroom
Penguin Suit
Cloud Flower
Rock Mushroom
Dash Pepper
Blimp Fruit
Bulb Berry
Boomerang Flower
Statue Leaf
Invincibility Leaf
Gold Flower
Super Acorn
P-Acorn
Boost Star
Super Bell
Double Cherry
Lucky Bell
Luigi Mushroom
Safe:
Out:
Enjoy!
In Danger:
Super Mushroom
Fire Flower
Super Star
Super Leaf
Frog Suit
Tanooki Suit
Hammer Suit
P-Wing
Super Flower
Cape Feather
Power Balloon
Carrot
Wing Cap
Vanish Cap
Metal Cap
F.L.U.D.D.
Hover Nozzle
Rocket Nozzle
Turbo Nozzle
Power Flower
Mario's Cap
Luigi's Cap
Wario's Cap
Ice Flower
Copy Flower
Mix Flower
Blue Koopa Shell
Mini Mushroom
Mega Mushroom
Mega Star
Bee Mushroom
Boo Mushroom
Spring Mushroom
Red Star
Rainbow Star
Propeller Mushroom
Penguin Suit
Cloud Flower
Rock Mushroom
Dash Pepper
Blimp Fruit
Bulb Berry
Boomerang Flower
Statue Leaf
Invincibility Leaf
Gold Flower
Super Acorn
P-Acorn
Boost Star
Super Bell
Double Cherry
Lucky Bell
Luigi Mushroom
Safe:
Out:
Enjoy!