浙江图书馆

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.

SCI-Hub实时更新可用网址链接

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.

众多诺贝尔奖得主和慈善机构支持的非赢利性学术组织。

这个网站集合了世界各地护照样式，还有办理程序，办理难易程度等等。Passport Index curates, sorts and ranks the world's passports. Explore passport designs, browse by visa-free score, color, or country and discover how they rank.

是一个旨在为用户提供OA资源检索和全文链接服务的公共服务平台。