Alfresco PDF Toolkit adds additional functionality to Alfresco, enabling the manipulation of PDF files.
Append -- Append PDF to another PDF, generating a new PDF
Split -- Splits a PDF at a specified interval, (ex. 2 pages, 3 pages, etc.), generating new PDFs for each section.
Split At -- Split PDF into two PDFs at a specific page, generating two new PDFs.
Insert PDF -- Insert PDF at a specific Page
Delete Pages -- Deletes pages from a PDF document
Extract Pages -- Extracts specific pages from a PDF document
Rotate PDF -- Rotate the pages in a PDF document
PDF Encryption / Decryption
TIFF to PDF transformation
All of the actions are available as actions that can be used in content rules, and as document library actions in the document browse and detail views. A teaser screencast is available here: http://www.youtube.com/watch?v=cJYpFgx037E