Platforms: iOS, Android, Windows 8 (all free)
It’s pretty obvious that an easy way to get rid of paper is to get rid of printed books. Instead of lugging around textbooks, research materials, and airplane fodder, download the Amazon Kindle app. Sure, your tablet may not be an easy-on-the eyes e-Ink e-reader, but it’s easy enough for quick business reading on a cross-country flight. The Kindle app lets you access Kindle books (including library books), and has several nice features including different backgrounds, a built-in dictionary, and adjustable text size.