Functions:
Split pdf-files,
Merge pdf-files together,
Compose new PDF-Files while using individual sorting, customized patterns (similar to Word printing), etc.
You can even append encrypted PDF files to another PDF document
Faster than Java based PDF Split & Merge Tools
Can be used on USB-Sticks as PortableApp PDF Split & Merge Tool
Support for English and German is included.
The freeware version of 7-PDF Split & Merge has 2 limitations: only 5 pdf-files can be merged; only the first 50 pages are taken into consideration during the splitting process. These limitations are removed in the Pro Edition of 7-PDF Split & Merge, which has a prize of 10 Euro.
If you need a free portable app able to split or merge 147 pages, you can use PDFTK Builder: 
PDFTK Builder , which is available only in english, however.
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