PDFtk Server is our command-line tool for working with PDFs. It is commonly used for client-side scripting or server-side processing of PDFs. It is also used by OEMs and ISVs to give their products the ability to manipulate PDFs. A commercial license is required to distribute PDFtk with your commercial product.
rEFIt is a boot menu and maintenance toolkit for EFI-based machines like the Intel Macs. You can use it to boot multiple operating systems easily, including triple-boot setups with Boot Camp. It also provides an easy way to enter and explore the EFI pre-boot environment.