PDF Photos is an excellent picture to PDF converter app for iOS.
Adobe Scan – free PDF scanner app turns your iPhone iPad into a powerful portable PDF scanner that support OCR and recognize text automatically.
Dr.Fone for iOS is the best iPhone data recovery and iPad data recovery software. It comes with both Mac OS X and Windows PC versions. You can recover your deleted, lost files and data such as Contacts, Photos, Messages, Camera Roll, Photo Stream, Photo Library, Messages Attachments, Call History, Calendar, Notes, Reminders, Voice Memos, Safari Bookmark.
Videoshop is an easy-to-use video editor for iPhone iPad user that come with plenty of useful tools.