AllTheItems is a simple coremod for Minecraft which eliminates the vanilla behavior of combining items on the ground into item stacks.
Why would you possibly want to do that, you might ask? Well, a practical reason would be in testing a mod. But the more likely reason is for nostalgia, since this was the standard behavior in Minecraft 1.2.5 and earlier. There's a distinct difference in walking through a bunch of items and hearing the rapid item collection sound, as opposed to picking up a couple or so item stacks. Some people found the older method more rewarding when mining, which this brings back.
As of v1.1, you can type /toggleitemgrouping into the console to toggle this behavior.
You don't need to ask permission to include this mod in a modpack. However, I do prefer that you include a list of mods somewhere on your site/page/thread with a link back to this forum thread, in case someone wants to report a bug.
You do not have my permission to re-host any of my mods in a way that you collect ad revenue for yourself from the download. I'm specifically putting this here because I know there are some sites which are doing it. Mod makers don't spend hours coding for you to profit off of them for doing nothing.
While I miss the sound, the grouping was introduced to reduce item lag
It definitely was, and I still remember a couple of mishaps where I'd log into a 1.2.5 server and find a mountain of items spilled in the floor from overflowing chests, leaving me at around 1FPS until I could fix it.
However, chances are, people who find a mod like this appealing are just going to be playing singleplayer with it, and I doubt it will ever be too much of an issue. Though I've recently considered seeing if I can add a /gamerule command to toggle it on and off while in-game.