Coherent Command Line PDF toolkit for Windows, Mac and Linux give you a wide range of professional, robust tools to modify PDF files manually from the command line, from scripts or within programs. They're based on our own PDF technology. They come with a comprehensive 48-page manual.

Feature highlights (full list)

• Quality Split and Merge, keeping bookmarks.
• Linearize (Fast web view)
• Encrypt and Decrypt (including AES encryption)
• Scale, rotate, crop and flip pages
• Copy, Remove and Add bookmarks
• Add logos, watermarks, page numbers and text
• Make PDF-based presentations
• Put multiple pages on a single page
• Add, remove and manipulate annotations
• Read and set document information and metadata
• Add and remove file attachments
• Thicken hairlines, blacken text, make draft documents

Availability:

• For Windows, Mac OS X and Linux/x86 (Other platforms by request)
• Comprehensive 48-page manual
• Business and Personal licenses available, and generous discounts on multiple, server or developer licences by request.

Priced from £39 (About $80). Available for purchase online, or find a reseller.