Commercial pdftk tools for PDF split, merge, encrypt, stamp etc. Cpdftk is a commerical, supported, faster version of the popular open-source Pdftk. It has the same interface as pdftk, but is based on our own commercial PDF libraries.

Cpdftk implements almost all of the pdftk commands:
1. Merge PDF Documents
2. Split PDF Pages into a New Document
3. Rotate PDF Documents or Pages
4. Decrypt Input as Necessary (Password Required)
5. Encrypt Output as Desired
6. Apply a Background Watermark or a Foreground Stamp
7. Report PDF Metrics such as Metadata and Bookmarks
8. Attach Files to PDF Pages or the PDF Document
9. Unpack PDF Attachments
10. Burst a PDF Document into Single Pages
11. Uncompress and Re-Compress Page Streams
12. Repair Corrupted PDF (Where Possible)

Synopsis
pdftk <input PDF files | - | PROMPT>
[input_pw <input PDF owner passwords | PROMPT>]
[<operation> <operation arguments>]
[output <output filename | - | PROMPT>]
[encrypt_40bit | encrypt_128bit]
[allow <permissions>]
[owner_pw <owner password | PROMPT>]
[user_pw <user password | PROMPT>]
[flatten]
[compress | uncompress]
[keep_first_id | keep_final_id]
[drop_xfa]
[verbose]
[dont_ask | do_ask]

Limitations:
* Places DEMO over each page processed

The license of this software is Free Trial Software, the price is $39.55, you can free download and get a free trial.