Needed information about a plugin

Hello sir,
really amazing plugins thanks alot for it i really need to know about a plugin but i dont know the name of i please take a look
http://www.upwallpapers.net/wings-and-pearls/
or
http://wallpaperskd.com/wallpaper/lago-azul/
you will see the resolutions of every wallpaper can u tell me about this plugin thanks

http://ww.wp.xz.cn/extend/plugins/pb-responsive-images/