Prune Scene  With Prune Scene you can clear your 3Ds Max scene from scripted viruses and accumulated garbage. 
This allows in some cases to greatly reduce the size and accelerate saving of scene. CopyTo  With CopyTo script you can copy objects and paste them into the current scene or between open windows 3Ds Max.
Pasting objects will work even after the reopening 3Ds Max or restart the computer.
Copying can also occur between the different versions of 3Ds Max.
For example, you can copy objects from 3Ds Max version 2016 in to 2013 or vice versa. Window Placer  This script is used for quick placement of windows in 3Ds Max scene. 
Before using the script requires preset the windows. 

In new version added Break Out Online  Mini arcade game, made in MaxScript. Stock Model Fixer  With this script you can quick prepare model, downloaded from 3D stocks, before merge into your main scene.

Stock Model Fixer is indispensable when using models from 3ddd/3dsky, cgtrader, hotpies and other resources.
Counter Game Online  Mini MaxScript game for levelup mathematics skills. Paste Ref Image  With this script you can quickly create planes with reference image in 3Ds Max. Save To Lower  This script allows you to create a button in the interface or create a shortcut to automatically save the file to the lower version for 3ds Max.
For example, if you have a 2014 version, the script will save in 2011.

Works for 3Ds Max 2012 - 2020.

It is installed as a regular script, just Drag&Drop script in to viewport.
Then find it in Customize -> Customize User Interface, choose Category: [3DGROUND] and assign hotkeys for Model Packer  With this script you can pack your model for 3D Stocks and own Assets Library.