Bibliopedia is an open source, semantic wiki research platform designed to crawl scholarly resources including JSTOR, the Library of Congress, the Arts and Humanities Citation Index, and similar data sources, extract metadata about works cited, convert that data into a semantic web format, aggregate the different repositories, then display the results on a wiki-style website for the scholarly community to verify, add to, annotate, elaborate, and discuss.

BibServer is a tool for quickly and easily sharing collections of bibliographic metadata.

Bookends is reference management software that allows you to collect, annotate, and cite publications. Bookends performs Internet searches to retrieve references and associated web pages, or find and import references from other locations.

CiteULike is a free service to help you to store, organise and share the scholarly papers you are reading. When you see a paper on the web that interests you, you can click one button and have it added to your personal library. CiteULike automatically extracts the citation details, so there's no need to type them in yourself. It all works from within your web browser so you can access it from any computer with an Internet connection. CiteULike supports annotation and rating of items, and upload of attachments (e.g. PDF file). (Attachments are only accessible privately by individual users).

Designed for journalists, a web-based service for working with primary sources that features search and analysis, highlighting and annotation, and document sharing. Uses Tesseract for OCR and allows users to upload documents and search other its document collection.

JabRef is an open source bibliographic reference management tool. You can import BibTeX and LaTeX files to generate bibliographies in a number of different styles.

MLA, APA, Chicago / Turabian and most-common Bluebook forms as an integrated citing and note-taking platform for individual or group projects. Prompts for analysis of source types and is unique in offering teaching support and personal help on any citation. Instructor / librarian view allows teacher to comment on work-in-progress providing just-in-time feedback in-context. Archives copies of web pages and pdfs which can be annotated. Dashboard provides long-term access to a portfolio of work.

Software for searching for research materials and organizing them. Also supports scanning documents within Papers, sharing research, automatically grabbing metadata, sharing articles, etc.

Desktop application to quickly search Zotero references and open PDFs attached to those references.