combine PDF files

Recently I often have piles of PDF files to do with, it's a really hard task.
But fortunately, I hunt a PDF Merger to help me combine same classified files into a single document.
Is there any similar software as Kvisoft PDF Merger?

Easy to use PDF Merger (http://www.kvisoft.com/pdf-merger/) I know.

On freecode.com a search produced several hits. They get fancier as you progress down the list. Here Some of them have GPL license; others have Shareware, so choose wisely.

PDF files are known for their widespread use and convenience of use. However, large size PDF files tend to oppose this fact due to manageability and transfer failures. Try Kernel for PDF split and merge tool to find an easy solution to this issue. Split any PDF file of any size into chunks and use them effectively. Not just split but even merge small PDF files with this dual use tool. Kernel PDF utility is also available for free download.

well, great. If you want to convert pdf to flash page flip and make your own amazing flip page magazine, then an simple yet powerful digital magazine software is highly recommended.

thanks for sharing ,i know the software you recommend and one of my friends often employ it to do the image processing. and i can give you one more choice which is recommended by my friends when i met such the same problem. it can merge pdf files into one quickly and the quality is also great. someone who has no way to do that can have a try.