UI－素材网址

https://pixabay.com/
https://picjumbo.com/
http://www.gratisography.com/
http://lifeofpix.com/
http://imcreator.com/free
https://giphy.com/
https://visualhunt.com/
http://cn.forwallpaper.com/

http://www.uisheji.com/app
https://www.pexels.com/
http://www.tuyiyi.com/
这些网址 有高清大图素材网、设计欣赏、各种设计网址导航、设计论坛等。
https://www.pexels.com/

https://500px.com/

http://www.pdfzj.com/14297.html

http://www.zcool.com.cn/

http://www.68design.net/

http://huaban.com/

http://www.nipic.com/index.html

http://shijue.me/

http://www.quanjing.com/

http://eput.com/editors/2

https://dribbble.com/

https://alpha.wallhaven.cc/search?q=England&categories=111&purity=110&sorting=relevance&order=asc

https://500px.com/popular

https://niice.co/

https://www.behance.net/

https://pixabay.com/

http://www.niudana.com/

http://www.tooopen.com/

http://www.onepagemania.com/

https://1x.com/

http://illusion.scene360.com/

http://www.missyuan.com/