Foxit Reader, currently version 7 is a small, but fast and secure, free viewer, that allows you to open and edit PDF documents. It is a very good alternative to Adobe Reader. It is quite fast at opening even large
Foxit PDF Reader
Best Free Software 15: Alternatives to Adobe Reader for viewing and creating PDF documents
Having a PDF (Portable Document Format) document viewer on a PC is a must for any one dealing with documents. Even for someone who only occasionally encounters them, soon or later you will probably need to view or create one.