Read It Later
Don't have time to keep up with the Web pages and sites you want to read? Install Read It Later in a number of ways: as Firefox extension, a bookmarklet to use in another browse, or as an iPhone app. This freebie earmarks content you can't get to now so that you can enjoy it later, online or off.
Note: This link takes you to the vendor's site, where you can download the latest version of the software appropriate to your browser or OS.