pdfMachine batch is a Windows application for batch operations on more than one file.

Converting files to PDF

You can convert multiple Word and Powerpoint files to PDF.

Stamping PDFs

You can apply text stamps to a multiple PDFs.

Combining / merging multiple PDFs into one PDF

Drag and drop the files then select 'combine' and up pops pdfMachine with the combined / merged file.

OCR

Perform batch Optical Character Recogniton on multiple files at once.

Password protecting

Passwords and permissions can be applied to multiple PDFs.

For details and download check out pdfMachine batch.