If you are in hurry or in case of emergency where the computer you are using doesn’t have any kind of software that allows you to create PDF file and sending PDF file across to someone is your requirement, CreatePDF service from Adobe lets you create 5 PDF files and then download it for free. It supports most of the document format including MS Office.
Though this service costs 9.99$ per month which includes facilities like combining multiple documents etc.
This solution is perfect as you need not to install anything on the computer you are on and just get your work done. Check out Create PDF