[Free] Google Play Books, https://itunes.apple.com/us/app/google-play-books/id400989007?mt=8 In addition to all the normal ebooks, you can rent textbooks for up to 180 days and access them through Google Play apps across devices.
[Free] iBabylon, https://itunes.apple.com/us/app/ibabylon/id353952483?mt=8- You can translate words, paragraphs, and entire documents, while also receiving dictionary and Wikipedia results. Also has text-to-speech feature and grammar checking.
[Free] Find My iPhone at https://itunes.apple.com/us/app/find-my-iphone/id376101648?mt=8 See where your devices are, remotely make them play a sound to help you find them, or remotely lock or wipe your lost or stolen device.
[Free] Free Graphing Calculator at https://itunes.apple.com/us/app/free-graphing-calculator/id378009553?mt=8 Scientific calculator, graphing abilities, unit conversion, pre-programmed constants, and formula library.
[Free] Quick Graph: Your Scientific Graphing Calculator at https://itunes.apple.com/us/app/quick-graph-your-scientific/id292412367 2D and 3D equation plotting, ability to copy and save equations and graph images.
[Free] EBSCOhost at https://itunes.apple.com/us/app/ebscohost/id433269587?mt=8 Scholarly research on the go! For instructions on how to get yourself authorized in the app, see: http://www.lonestar.edu/library/15366.htm#Apps
[Free] Bluefire Reader at https://itunes.apple.com/us/app/bluefire-reader/id394275498?mt=8 Use this app to read ebooks you've checked out from the EBSCO ebook collection. (You'll also need a free Adobe account and Adobe Digital Editions on your computer.)
[Free] CamScanner at https://itunes.apple.com/us/app/camscanner-free/id388627783?mt=8 Take a photo of a document and turn it into a PDF. Features include auto-cropping, notes & annotations, and text recognition for easy searching.
[Free] STUDYBLUE at https://itunes.apple.com/us/app/studyblue/id323887414 Download or create flashcards to review before exams, including audio, images, and equations. Supports flashcard-sharing and question-asking with your classmates who also use the app.
[$] Snap2PDF at https://itunes.apple.com/us/app/snap2pdf-scan-documents-share/id472940721?mt=8 Use your phone's camera to digitize paper documents as PDFs with multiple pages per file. A [Free] alternative is CamScanner.
[$] iStudiez Pro at https://itunes.apple.com/us/app/istudiez-pro/id310636441?mt=8 Add in your class schedule, assignments and due dates, set a homework study schedule and even keep a contacts list of professors or your social network. Enter your grades as you receive them to stay on top of your course grade and GPA.
[$] SafeTrek at https://itunes.apple.com/us/app/safetrek/id716262008?mt=8 By holding down the SafeTrek safe button, a user is able to passively connect to police. If nothing unexpected happens, a user simply inputs their unique 4-digit pin to cancel an alert from being sent (to police). If a situation takes a turn for the worse, a user simply releases the safe button without typing in their pin number and is connected to police.