达芬奇的经典手稿大集合，图片都可以下载观看。Leonardo da Vinci - A comprehensive resource for Leonardo da Vinci's paintings, drawings, quotes, and biography
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
无版权-有套图、需登录,支持中文搜索，有同色系、类型的图片推荐。
免费商用-景色建筑为主，色调比较统一Free high resolution photography. Share and download images freely. Search for pictures by color or format. Photographers, get an account now !
有大量高分辨率图片供个人或商业使用，照片按热门标签、颜色分类。Beautiful free images for personal and commercial use. All business, food, people and technology photos are free, high-resolution, and no attribution is required. CC0.
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..
瓦栏（walanwalan.com）,是印花、花型设计服务的互联网平台,汇集国内外图案设计师以及原创设计创意,瓦栏集花型设计,版权登记,私人定制,以图搜图,在线试衣,在线打印等众多服务为一体，致力于打造纺织印花行业的一站式服务平台.
