Popularity isn't the best judge of quality, but it's not a bad place to start - especially in a pinch. Instapaper is a wonderful app that captures online articles and stores them for clean offline reading on your mobile device. InstapaperFeed is one of many apps built by independent developers on top of Instapaper, but it's an especially cool one I think.

Here's how it works. First, give InstapaperFeed access to your accounts on both Instapaper and Twitter. Then the app will look at every link shared by someone you're following on Twitter, look for the ones that link shortening service Bit.ly has clickthrough numbers for, and post the most popular ones each day to your Instapaper account. What a smart little hack!