Crafting something but don't know where you've put your iron? This is a small mod to show you where items are in nearby inventories, like Extra Utilities 2's old feature. Needs to be installed on both the server and client.
Hover over an item in your inventory or REI, and press the keybind (default "Y") to find all stacks of that item in nearly inventories. You can also hold shift to also match the item's NBT, useful for favouriting your best pickaxe in REI to find later. The mod is highly configurable, ranging from visual options to server-side range and rate-limiting options if wanted.