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