"As of now

Features

• free for personal use
• merge many PDF documents into a single document
• split a PDF document into pages
• create visual watermark on a PDF document
• extract text from a PDF document to a text file
• attach files to a PDF document
• read and write metadata of a PDF document
• protect PDF document with password
• supports WWF file format
• standalone software (please check requirements)
• Adobe Acrobat or Adobe Reader not required
• can handle password protected PDF documents
• easy to use user interface
• the original PDF file will always remain intact, in case of error you won't lose anything

Requirements

• Windows XP, Windows Vista or Windows 7 operating system
• .NET Framework 2.0

There are programs with only two features:

• PDFMerge - merge documents
• PDFSplit - split a document
• PDFWatermark - watermark a document
• PDFExtract - extract text from a document
• PDFAttach - attach files to a document
• PDFProtect - protect a document
• all programs contain the ability to read and write metadata