How many times it happens that we're reading, listening or watching a video on the internet and we wish to save it for later use? Others do collect all these kind of media but then they'll forget where they had put them!
We need something free, open source and easy to use. Well, zotero is a great friend with everybody especially teachers and students. Zotero [zoh-TAIR-oh] is a free, easy-to-use tool to help you collect, organize, cite, and share your research sources.
Zotero is the only research tool that automatically senses content in your web browser, allowing you to add it to your personal library with a single click. Whether you're searching for a preprint on arXiv.org, a journal article from JSTOR, a news story from the New York Times, or a book from your university library catalog, Zotero has you covered with support for thousands of sites.
Zotero collects all your research in a single, searchable interface. You can add PDFs, images, audio and video files, snapshots of web pages, and really anything else. Zotero automatically indexes the full-text content of your library, enabling you to find exactly what you're looking for with just a few keystrokes. It is available for windows, mac and linux.