Google Scholar - Google Scholar is a freely accessible web search engine that indexes the full text of scholarly...
Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.
Scopus - Scopus is a bibliographic database containing abstracts and citations for academic journal articles.
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.
ACI Scholarly Blog Index - ACI is revolutionizing the way people conduct research by enabling them to find the content they’ve...
JabRef - Graphical Java application for managing bibtex (. bib) databases.JabRef · JabRef Help · JabRef | Blog · OpenOffice/LibreOffice .