GRABCAD-3D模型
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
国内较大的无版权高清图片网站,提供各类高质量的无版权图片。
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StockSnap
免费商用-这个网站中拥有很多图片分类。The #1 source for beautiful free photos. High quality and high resolution stock images free from all copyright restrictions (CC0) - no attribution required.
Bottled Video
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..
New Old Stock
主要收集来自公共档案的新旧照片，有彩色的、黑白的，图片不受版权限制。Vintage photos from the public archives. Free of known copyright restrictions. Recapturing History.
MotionPlaces
是免费素材的另一个重要来源。Free Stock Video Footage by Motion Places. We offer a curated collection of beautiful footage you can use for your projects. Download our clips for free in HD quality, or purchase 4K clips for $99.
Pngimg-免扣图
The largest FREE transparent PNG images clipart catalog for design and web design in best resolution and quality
Pixabay
免费商用-发现免费图片和视频的最佳来源， 可以做商业用途、不要求署名等。
stockio矢量图
Stockio.com - 下载免费矢量，照片，图标，字体和视频
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