Do you find yourself being flooded with academic papers? The Papers app can help you get rid of accumulations of research literature. Papers gives you access to millions of academic science articles (including ACM, NASA-ADS, arXiv, and Google Scholar) and lets you download new PDFs to your library for offline reading and annotating.
Papers syncs with its counterpart on your Mac, and it works great as a stand-alone app, too. Available for iPad, iPhone, and iPod Touch.
Price: $14.99 (Universal) | Photo: Alec Couros