开源的化学分子式编辑、查看、绘制工具，包含了化合物、蛋白质、光谱数据库。MolView is an intuitive, Open-Source web-application to make science and education more awesome!

需翻墙-国外一个免费模型分享网站，囊括了各个领域和多种三维设计软件、素材。GrabCAD is the largest online community of professional engineers, designers & students. Learn about our 3D printing software GrabCAD Print & GrabCAD Shop

在线图片压缩，免费下载。Picdiet is a fast and robust online batch image filesize compressor written in JavaScript, images are compressed in your browser, completely free

它是国外免费分享网站,大量版权过期而进入公有领域书籍的一项协作计划。

图片可免费商用，去做点了不起的事吧！Startup Stock Photos are free startup, office, and tech stock photos ready for your next project. Used by millions. Make something awesome.

提供免费的640×480视频剪辑，可以购买的HD和4K素材。Free Stock Footage and Commercially Cleared Royalty Free HD & 4K Stock Footage..

除了免费视频，还有照片，音频剪辑，字体和纹理。Download Free Stock Footage: Video, Audio, Photos. All Content Is Completely Free And Ready For Using In Your Projects. Just Download And Use It..

享拥有180种渐变配色方案的网站，里面有很多格式供设计师选择。Come to WebGradients.com for 180 beautiful linear gradients in CSS3, Photoshop and Sketch. This collection is curated by top designers and totally free.

Texture Haven是一个免版权纹理的网站，分辨率高达8k，完全免费。100% Free High Quality Textures for Everyone

免费的音效素材搜索，包含的素材种类非常多，特别适合经常做特效视频。Search the web for free sounds and sound effects

免费下载非洲， 美洲， 亚洲 ，欧洲， 地中海， 大洋洲历史地图。d-maps: Free maps, free outline maps, free blank maps, free base maps, all the countries of the world, high resolution GIF, PDF, CDR, AI, SVG, WMF

优秀英文字体精选。Archive of freely downloadable fonts. Browse by alphabetical listing, by style, by author or by popularity.