so many web design icon which can be used free. https://www.pngitem.com/so/web-icons/ I think it is easy to use.

Thanks Clipartkey Team. This is a very clean and very good free picture material station. It is very helpful for me to find the material. Designers can collect it. If I find better resources, I will share them with you in time.

Mark the site for myself and designers. Jing.fm is a fun and open clip art image sharing community. Users can upload or download free or copyright-free clip art or cartoon picture material at any time according to their preferences.

PinPNG.com collects million of free transparent png images, cliparts and icons. All hd images is unlimited download for your personal and non-commercial projects.

When I designed the website, I found a lot of free and interesting cartoon material from this platform.

Bookmarked! But I still find some copy-right image on favpng. I also try to use more other png image platform, such as https://www.clipartwiki.com