Blogs, Twitter, Facebook stories and RSS feeds are all about reading right this second. But you don't always have time for that. Instapaper solves the problem by caching up to 500 articles from around the Web and keeping them tidily digitized. So now, when you come across an intriguing headline, Instapaper saves it for later. When you do open an article, you see a stripped-down version in a plain text format that puts your primary focus on the content. As a personal favorite, we find the app's recently overhauled, grid-style UI for easier navigation makes it a true must-have.