Mendeley: "Mendeley is a free reference manager and academic social network that can help you organize your research, collaborate with others online, and discover the latest research." You can generate bibliography, import papers, find relevant papers, access your papers from anywhere online, and more.
RefWorks: RefWorks is a commerical, web-based citation management tool.
Zotero: Zotero is a free citation management and creation tool. It requires a free Firefox extension downloaded to the web browser.
If you would like more detailed information about conducting research visit this LibGuide: Reasearch A-Z.