Font Awesome Icon
The complete set of 675 icons in Font Awesome
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vjshi
正版素材，影像视觉，我们更懂您！
tretars
The best free Mockups from the Web
skitterphoto
a place to find, show and share public domain photos
Sketch App Sources
Free design resources and plugins - Icons, UI Kits, Wireframes, iOS, Android Templates for Sketch
1ppt
第一PPT站内资源以免费下载为基础，本着开放的共享为原则，服务于国内广大国内PPT爱好者
51ppt
（免费）网站看着有些杂乱，部分模板有些太接地气，PPT模板中选择“国外模板”有许多优质模板可以下载。
pngimg
免抠素材，好东西啊，该网站也是免费无限量下载，值得推荐~
Piqsels
免版权图片素材
Medialoot
Free & Premium Design Resources — Medialoot
screen sizes
Viewport Sizes and Pixel Densities for Popular Devices
freepik
More than a million free vectors, PSD, photos and free icons.
Fontex
Free Fonts to Download + Premium Typefaces
iconmonstr
Free simple icons for your next project
magdeleine
HAND-PICKED FREE PHOTOS FOR YOUR INSPIRATION
Simpleline Icons
Simple line Icons pack
UIkit.me
最便捷新鲜的uikit资源下载网站
90设计
电商设计（淘宝美工）千图免费淘宝素材库
模型网
（明码标价）长沙西吉网络科技有限公司旗下的CG模型网
publicdomainarchive
New 100% Free Stock Photos. Every. Single. Week.
3d材质库
3DCZK.COM,我们一直为3D设计师做最好的服务而不断努力着!
gratisography
Free high-resolution pictures you can use on your personal and commercial projects, free of copyright restrictions.
Awesome Sketch Plugins
A collection of really useful Sketch plugins.
colorhub.me
免版权素材
iconfont
阿里巴巴矢量图标库
IcoMoonApp
Icon Font, SVG, PDF & PNG Generator
Mockup World
The best free Mockups from the Web
Unsplash
Beautiful, free photos.
素材搜索
设计素材搜索聚合
比格ppt
(免费）逼格人人有，远近高低各不同。