DuckDuckGo
只提供网页、图片、视频、新闻搜索。它的口号是：隐私保护，化繁为简。The Internet privacy company that empowers you to seamlessly take control of your personal information online, without any tradeoffs.
SooPAT 专利搜索,专利搜索,专利查询,检索,下载
数据统计
相关导航
Open Access图书馆
Open Access Library (www.oalib.com) is an academic search engine and publisher. You can download research papers for free and submit your paper to it. It is a shared academic database.
UI-cloud素材搜索引擎
UI-cloud素材搜索引擎。UICloud collects the best user interface designs and provides a search engine for you to find the best UI elements that you need.
谷歌镜像-A
主要提供谷歌学术搜索Google Scholar镜像和谷歌网页搜索镜像的导航站,实时更新最新镜像网站
大作——找灵感，用大作
为设计师定制的集合式搜图引擎,同时收录全球最全的设计素材供设计师使用。
谷歌镜像合集
此链接为镜像合集目录
今日头条搜索
是一款基于数据挖掘的推荐引擎产品。
Semanticscholar
检索结果来自于期刊、学术会议资料或者是学术机构的文献。Semantic Scholar uses groundbreaking AI and engineering to understand the semantics of scientific literature to help Scholars discover relevant research.
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