Science Mobile (FREE)
From the American Association for the Advancement of Science.
"Read summaries, abstracts, and, for subscribers, full-text articles from Science, Science Translational Medicine, and Science Signaling.
• Share articles, links, and job postings through Facebook, Twitter, and e-mail.
• Get the latest news at ScienceNOW.
• Search job openings and tap other resources at Science Careers.
• Access the Science weekly podcast and other multimedia.
• Store content for reading without an Internet connection." -iTunes