Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.
ResearchGate - Access scientific knowledge, and make your research visible
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.
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.
JabRef - Graphical Java application for managing bibtex (. bib) databases.JabRef · JabRef Help · JabRef | Blog · OpenOffice/LibreOffice .
The Literature Network - We offer searchable online literature for the student, educator, or enthusiast.