Mendeley - Easily organize your papers, read & annotate your PDFs, collaborate in private or open groups, and securely access your research from everywhere.
Polaroid Zip Instant - A pocket-sized device for instant photo printing
Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.
Prynt - Turn your smartphone into a Polaroid
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.
POLAR - A powerful document manager for Mac, Windows, and Linux for managing web content, books, and notes and supports tagging, annotation, highlighting and keeps track of your reading progress.