SooPAT 专利搜索

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.

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.

收录中外文学术期刊7000多种，资料、文献非常丰富。注册后可直接下载。

这个网站可以帮助你找到最好用的网站、软件，硬件等。Slant is a product recommendation community with the goal of making it effortless to find the best product, app or game for you. No more spending hours doing product research with tabs full of forums and reviews.

收录的OA期刊数量非常多，属于目前最好的的OA期刊目录网站。DOAJ is a community-curated online directory that indexes and provides access to high quality, open access, peer-reviewed journals.

是一款基于数据挖掘的推荐引擎产品。