WorldWideScience Alternatives

Google Scholar is a freely accessible web search engine that indexes the full text of scholarly...

An academic search engine that utilizes artificial intelligence methods to provide highly relevant results and novel tools to filter them with ease.

Scopus is a bibliographic database containing abstracts and citations for academic journal articles.

Scinapse is a free, nonprofit, Academic search engine for papers, serviced by Pluto Network.

Biohunter is a one-stop portal for literature search, batch-download PDFs and reference manager

Google Books is a search engine developed under Google Inc.

Academia is a website where you can share papers that are written with other users. You can use a Google or Facebook account to sign in to the website.

PubMed Central is a free-to-use digital repository that provides open access to detailed articles that have been published in life sciences and biomedical journals.

BibSonomy is a system for sharing bookmarks and lists of literature (BibTex format).

Automatic works cited and bibliography formatting for MLA, APA and Chicago/Turabian citation styles.

Science.

Facilitating the global conversation on academic literature.

Easily organize your papers, read & annotate your PDFs, collaborate in private or open groups, and securely access your research from everywhere.