Lot would have already been discussed about this app / Plugin (Pocket – http://getpocket.com/) formerly called ReadItLater. This is an amazing app that keeps my reading websites across devices.
I have this in my Firefox plugin as an Addon in my laptop. As I visit new website which grabs my attention, I add that in the Pocket reading List. I have installed the android version in my mobile. So on the go what ever website I have added in the reading list before I continue reading it. When I use my IPad I continue with the same reading list.
It is also has a offline viewing feature. Were the website is downloaded for offline viewing when there is no Internet connection.
ubiquitous computing at its best!!