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.
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.
Perform batch Optical Character Recogniton on multiple files at once.
Passwords and permissions can be applied to multiple PDFs.
For details and download check out pdfMachine batch.