Cattitude

Can resize both peds and objects by aiming at them!

Controls configurable in ini. Refer to this page to figure out what value corresponds to which key.
KeySetScale (default Comma ) to set the scale to use (An input field pops up). KeyScaleOther (Period by default) to apply that scale to whichever ped or prop you're aiming at. Seems to also change the height at which to get in and out of vehicles, though their appearence doesn't change. KeyScaleSelf (defaults to Question mark) to apply it to yourself.  
Future updates, if any, would focus on expanding what sort of things resizing works on.
For now, holstered guns of shrunken people are still simply invisible.

This is basically an improved version of Ped Resizer, except as an asi mod.

Both AB's Scripthook and Scripthookv2 should work, but I recommend the latter.
 

Wasn't quite satisfied with the shrink/growing options in other mods, so I made this standalone to my liking.
 
Controls:
Comma to set the scale to use (An input field pops up). The only limit is 8 characters. Period to apply that scale to whoever you're aiming at, or who you're targeting/locked onto. (Oem) Question mark to apply it to yourself. (This one varies per keyboard. For my german Qwertz it's #, for US standard it should be ?).
Hardcoded, sorry.
I don't like how the oversized guns look when someone is shrunk. In the future I'd like to make it look like the guns shrunk with you (can't actually scale them, but SHENANIGANS should be able to produce something indistinguishable).
For now, I simply chose an arbitrary scale, 0.7, under which all weapons will be invisible while holstered.
 
Requires ScriptHookRDR2DotNet-V2
 
The mod dll goes in the scripts folder within the RDR2 root – if you don't already have that folder, make it.

Make animals poop. Including yourself if you are a species that can (transform using a trainer).

Press F10 (Sorry, hardcoded) to make target feel the need to poop.
If a ped is in your crosshairs, or being targeted/Locked onto, it will affect them, otherwise it will affect the player.

Aside from filling up the poop-o-meter, the script also stops them from everything else they were doing, drains every motivation that isn't pooping, and commands them to stand in place for a bit. I exempted the player from that, because it's annoying to be stuck in place if you miss a horse you wanted to make poop.

Limitations:
Can't poop in the same place twice in a row. Gotta leave a certain radius or something. Dogs don't seem to wanna poop in the rain It's not instant. The pooping triggers at a certain point in idle animations it seems. Despite my efforts, peds still sometimes get other ideas before or while the pooping triggers. Saw a dog make a trail of poop as he walked back to his resting place. When transforming into a Horse, sometimes you can't poop for a while. (Possibly when you turn from dog to horse) Dying fixes this.  
Additional uses:
Stunlock Calm Horses for a bit (Having to poop is so relaxing) Calm fleeing people (But not people in combat) Get people out of vehicles/off horses  
Requires ScriptHookRDR2DotNet-V2
 
The mod dll goes in the scripts folder within the RDR2 root – if you don't already have that folder, make it.