Mendeley - Easily organize your papers, read & annotate your PDFs, collaborate in private or open groups, and securely access your research from everywhere.

Monkkee - Keep a private journal securely on the Internet – to provide a convenient user experience your...

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.

The Guide - The Guide is a two-pane outliner - a program that allows you to arrange text notes in a tree-like...

Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.

Scrapbox - A new style of note-taking that lets you create, discuss, and learn together in one self-organizing space.