Bag of Tricks - 1E
Black Razor - 1E Stormbringer for D&D
Hat of Disguise - 1E
Ring of the Ram -1E, 4E is ok too
Decanter of Endless Water, Boots of the North, Iron Bands of Bilarro, Apparatus of Kwalish,
Iron Flask, Universal solvent, Eversmoking Bottle, Murlynd's Spoon, Figurine of Wondrous Power, especially Ebon Fly, Iridescent Spindle Ioun Stone (no need to breathe), and Wand of grease are all great.