iTween

http://u3d.as/content/pixelplacement/i-tween/1s9 download

http://itween.pixelplacement.com/documentation.php#MoveTo api

  iTween.MoveTo(gameObject, iTween.Hash("x", 5, "time", 5, "easetype", iTween.EaseType.easeInBack)) ;

　　添加的物体(gameObject)以某一动作（easetype）移动到某一位置（hash(x, y, z)||Vector3）

  void OnMouseEnter(){} 当鼠标进入该物体时调用

     将物体move在鼠标移动到当前物体时以easeInBack的方式移动到当前物体上

    public GameObject move ;
    void OnMouseEnter(){
        iTween.MoveTo(move, iTween.Hash("x", transform.position.x, "y", transform.position.y, "z", transform.position.z, "time", 5, "easetype", 
　　　　　　iTween.EaseType.easeInBack)) ;
    }