Evernote

Evernote http://evernote.com/
has been a tool in my box for a long while.  It is a great way to save, organize  and curate sites across devices.  I love the Firefox add on web clipper,

 which lets me clip a page, or a section , and organize and annotate the clip very quickly.

I really like the ipad app, which lets me use my ipad to take pictures and add them to my various collections.
Classroom idea:  If you have an ipad, you can use Evernote and your ipad camera to quickly make a record of a students project, or presentation. Create notebooks on Evernote  for each student. Add your images and quick notes. Then when you access the work  later, you have a visual record of what you originally saw.