Instapaper the read it later app created by Marco Arment is free (Normally $3.99) on the AppStore this week until December 19th. You can find it on the frontpage under the Free App of the Week section.
With Instapaper you can save articles that you would like to read at some point, but do not have the time to read right now. It strips out the text of an article and provides you with a clean plain text article with no distractions.
The service is free to use with limits on how many articles you can save, and disabled search functionality. These limits are lifted with the a subscription service. Fortunatley through the end of the year new users get two free months of the subscription based services according to Instapaper's blog; check out their post by clicking through the title post.