Inventory Tweaks is a fairly simple mod. It does not in any way massively change the way the game works, but what it does do is that it allows you to sort your items with a simple click of a button. Seems fairly basic and boring, but you’d be surprised with how much time this mod can save you.
All you need to do is go into either you personal inventory or a chest, and click the middle-mouse button to automatically sort your items with others of the same type. You can also use the buttons at the top of the chest inventory to sort them further into columns or rows, depending on your preference.
Another neat trick thing about this mod is that it automatically replace the items in your hand should they break while you’re using them. So, for example, if you were mining using a Pickaxe and it breaks, the mod will automatically replace it for you, provided you have another of the same item in your inventory.
You can get the Inventory Tweaks mod here.