jPDFFields allows your application to get and set field values.
Documents by Readdle - A central hub for all your files.
iTextPDF - iText offers flexible tools for PDF creation, editing and inspection.
Documents Pro 7 - The ultimate all-in-one mobile office suite for the iPhone and iPad with 8 premium apps in 1.
iText - iText is an intuitive and refined text editor with word processing completely rewritten in Cocoa...
GoodReader - With GoodReader on your iPhone, iPod Touch or iPad, you can read virtually anything, anywhere.
RadaeePDF Master SDK - RadaeePDF SDK is a powerful PDF rendering library for Android iOS and Windows 8/8.1, WindowsPhone and Windows 10 UWP. RadaeePDF SDK can render, create, annotate, modify PDF files. RadaeePDF SDK can get and set PDF form and acroform.