I have been using Evernote more recently to store articles I find for future reference and as a note-taking tool.
There are many great reasons to use Evernote. Many of which I haven't even tapped into as of yet. However, I do use it to categorize articles I have read, plan to read, or am saving for future reference. I also use it to take notes. I also love it because I can access it from any device I am using - iPhone, iPad, or my laptop computer.

It's FREE and a great way to go paperless.
You could also use it with your students - a great portfolio of student work.

www.evernote.com

A Guide to Evernote

www.readwriteweb.com/archives/evernote-a-0-to-60-mph-guide.php