Pngtree

iLoveIMG is the webapp that lets you modify images in seconds for free. Crop, resize, compress, convert, and more in just a few clicks!

BrushKing provide one of the largest collection of free Photoshop brushes, You can easily find and download them in the different sections of the website or via the search form

千库网推出的AI图片插画生成工具

昵图网_原创素材共享平台.图片素材图库提供海量原创素材,图片下载,摄影作品,设计素材,视频素材,ppt模板,PSD源文件,矢量图,AI,CDR,EPS等高清图片下载.

基于CC0授权的免版权图片库，数量挺多的

中文站点，同样是基于 CC0 授权的图片站，质量还不错。