Diigo

Looking for an online resource to:

• Collect- Save and tag your online resources for easy access anytime, anywhere.
• Annotate- Take notes on web pages and PDF's directly as you browse online.
• Organize- Store your links, references and personal input to create a structured research base through Outliner.
• Share- Send your research to friends, classmates, colleagues or associates.

Then you need to checkout diigo.