Mendeley - Easily organize your papers, read & annotate your PDFs, collaborate in private or open groups, and securely access your research from everywhere.
Community Questions for Confluence - Keep questions and answers in one place with an engaging, community-driven Q&A discussion forum, powered by Confluence
Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.
Question2Answer - A Q&A site helps an online community to share knowledge.
JabRef - Graphical Java application for managing bibtex (. bib) databases.JabRef · JabRef Help · JabRef | Blog · OpenOffice/LibreOffice .
Stack Overflow for Teams - Everything you love about Stack Overflow in a private space.