ezpz
single-script Easing Solution for GameMaker
Easing Tweening GMS
Quick script for easing and tweening effects for GameMaker Studio
Ease
Unity3D easing functions.
Button Objects for Gamemaker
Make buttons using objects in GamemakerStudio 1.4 and 2.
Green Tween - A Reflection Tween Engine designed for Inspector use
A Tween engine that can animate any field or property on any MonoBehaviour with zero GC
SuperSprite for GameMaker
Easy sprite effects for GameMaker
PRAction for GameMaker Studio 2
More than a set of tweening functions, this is a fully featured action system!
ITween Editor
ITween Visual Editor