* Merge PDF/PS[/TIF/FAX/JPEG/many other image formats] files
* Split PDF/PS files into single pages
* Print PDF/PS files
* View PDF/PS files (builtin Mini-PDF/PS-Viewer)
* Compare (text) content of 2 PDF/PS files (using Araxis PMDiff)
* Extract PS files from PDF files
* Flip pages upside down
* Add bookmarks (currently it cannot extract already present bookmarks)
* Add and update PDF metadata such as title, subject, author, keywords
* Rearrange pages
* Load/save listfiles to add sets of PDF/PS files at once
* more features to be added.
PDFMergeNX already has
* various options (page alignment, import bookmark headings etc.)
* national language support (English default, German and Dutch included)
* a simple builtin distiller (based on GhostScript, cannot do bookmarks)
* support for ePDF as distiller (required if bookmarks should be created, the output should be encrypted, a background watermark should be applied).
PDFMergeNX provides a graphical user interface (Screenshot) and acts as glue between GhostScript, XPDF 3.01.pl1 package and ePDF (these all must be installed as a prerequisite.
PDFMergeNX is still under heavy development, especially the documentation is not complete yet and therefore feedback of all kinds is appreciated. New features will be introduced after the release of version 2.0.
Source: eComStation.org