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

ResearchGate - Access scientific knowledge, and make your research visible

Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.

BioSeek Mobile - BioSeek Mobile - Next Generation Search For Life Sciences. Fast. Efficient. Free. We process at one go multi-component searches that are normally quite time consuming. We strive to deliver the clearest representations of massive amounts of data.

Qiqqa - Qiqqa is a free research and reference management software. It can be used in many organizational projects from the academic to the personal to the business endeavor. Read more about Qiqqa.

The Literature Network - We offer searchable online literature for the student, educator, or enthusiast.