PubMed.gov!

Mendeley helps manage and share academic knowledge: Mendeley Desktop is free academic software (Windows, Mac, Linux) for organizing and sharing research papers and generating bibliographies with 1GB of free online storage to automatically back up and synchronize your library across desktop, web and mobile. Mendeley Web is a free research network which lets you manage research papers online, discover trends and connect to like-minded academics. Mendeley tracks usage data on over 40 million research papers in real-time, thus creating a network of people using and sharing millions of scholarly articles - helping to shift research into the 21st century world of collaboration and openness. Mendeley is engendering a revolution in the way research is conducted and disseminated, changing the face of science. »

ResearchGate was built by scientists, for scientists.

Academia.edu is a social networking website for academics .The platform can be used to share papers, monitor their impact, and follow the research in a particular field. It was launched in September 2008, with 31 million registered users as of January 2016 and over 8 million uploaded texts. Academia.edu was founded by Richard Price, who raised $600,000 from Spark Ventures, Brent Hoberman, and othersAcademia.edu proclaims to support the open science or open access movements, and in particular instant distribution of research and a peer-review system that occurs alongside distribution, instead of occurring before it.[8] Accordingly, the company stated its opposition to the proposed (since withdrawn) 2011 Research Works Act, which would have prevented open-access mandatesHowever, Academia.edu is not an open access repository and is not recommended as a way to pursue green Open Access by Peter Suber and experts, who instead invite researchers to use field-specific repositories or general-purpose repositories like Zenodo »

Automatic works cited and bibliography formatting for MLA, APA and Chicago/Turabian citation styles. Now supports 7th edition of MLA.

Make the world a better place to live through scientific innovations to improve healthcare

An alternative interface to the PubMed medical literature database.

PubPharm is a search plattform tailored for pharmaeceutical researchers. It comprises more than 40 million citations and usually links to the fulltext (access depending on open access or license based on location).

Quertle is a free semantic-based search engine for biomedical information (PubMed/MEDLINE, full-text articles, TOXLINE, grant applications, news, and whitepapers). Using advanced linquistics and natural language processing, Quertle is able to find meaningful conceptual relationships (such as 'A regulates B', or 'C is caused by D') in documents, not just the query terms scattered throughout a document. Quertle's unique Power Terms (which represent entire classes of related concepts, such as 'diseases') allow the user to answer real questions, for instance 'what chemicals cause diabetes'. Quertle also automatically determines key concepts and provides an easy-to-use interface, dramatically reducing the time and effort required to understand the literature. »