很不错的一个图片无损压缩网站！
simple online GIF maker and toolset for basic animated GIF editing.
Viewport Sizes and Pixel Densities for Popular Devices
create QR codes for free (Logo, T-Shirt, vCard, EPS)
Android 9-patch shadow generator fully customizable shadows
SVG在线压缩平台
一个安全的证件打码网站
