Minecraft wiki entry for Pickaxe, associated text: Plastic diamond pickaxes are official Minecraft merchandise.[1]
In the game Naughty Bear: Panic in Paradise, the player can buy a diamond pickaxe which, according to the game, is made by "Kick it up a Notch Pickaxes", referring to Notch.
In mobile game Vlogger Go Viral clicker game, after buying the figurine shelf, there is a model of a diamond pickaxe stuck to a grass block.
In the game The Elder Scrolls V: Skyrim, the player can find a pickaxe called the "Notched Pickaxe", evidently an easter egg.
In the game Offensive Combat, a stone pickaxe can be used as a melee weapon with the name of "The Notch Carver".
In the game The Binding of Isaac, an obtainable item named "Notched Axe", also with a drawn 8-bit look, can be used to destroy rocks. The Notched Axe also makes a return in the game's remake, The Binding of Isaac: Rebirth.
In the game Borderlands 2, the player can find a secret area hidden away by blocks resembling Minecraft dirt, also once inside the player can fight Creeper and the Mother Creeper to get rare Minecraft-related skins.
In the game Octodad: Dadliest Catch, the supermarket level has a "Mintcraft" display, an obvious parody of Minecraft, even including toy pickaxes and a creeper head.