Zotero is a free browser add-on that helps you collect, organize, cite and share your research sources. This tool will create footnotes, endnotes, in-text citations, or bibliographies in Bluebook formats. Zotero will not import from closed systems such as Lexis, but records can be created manually.
Juris-M is a free variant of Zotero that can help you collect, organize, and cite your research.
A Juris-M tutorial and Basics guide by Georgetown Law librarians can be found here:
https://guides.ll.georgetown.edu/zotero_tutorial