Cisdem PDFMaster for Mac offers a complete PDF solution to help you work with PDF files in a highly productive way: convert, create, edit, merge, split, compress, encrypt and unlock PDF files.
PDF Merger Mac is a free Mac OS X application that let you merge several PDF documents into one single PDF file. The merged PDF file will keep the original formatting, page size and page orientation.
PDF Toolbox provides a set of utility functions for better working with PDF files. It lets you easily combine multiple PDF files into one, extract or insert pages, protect your PDF files with password and restrictions, compress your PDF and more.