很不错的一个图片无损压缩网站！
免费在线抠图软件,图片快速换背景-抠白底图
Android 9-patch shadow generator fully customizable shadows
create QR codes for free (Logo, T-Shirt, vCard, EPS)
Viewport Sizes and Pixel Densities for Popular Devices
一个安全的证件打码网站
simple online GIF maker and toolset for basic animated GIF editing.
