ApowerPDF is a professional PDF editor which helps people modify PDF content with ease. It has a clear and easy-to-go interface, which won't bring too much trouble to users to manage their PDF documents. Also, it can convert, rotate, split, extract, protect and unlock PDF files. Also, users can use it as a printer or PDF reader, as it has bookmark, and annotation features, etc. What's more, the program allows people to create PDF forms, sign PDF and many more, which can solve most PDF problems when people are processing PDF documents.
Icecream Apps PDF Editor - Excellent powerful tool to edit PDF, annotate PDF, redact, protect and more.
Beyond Compare - Beyond Compare allows you to compare files and folders.
Classic PDF Editor - View, Create, Convert and Edit PDF Files
WinMerge - WinMerge is an open source differencing and merging tool for Windows.
PDF Reader Pro - PDF Reader Pro is an all-in-one PDF office supporting to Read, Annotate, Edit, OCR, Convert, Create & Fill Form, Sign PDFs, TTS on Mac, iOS, Android, and Windows.
Meld - What is Meld? Meld is a visual diff and merge tool targeted at developers.