Software Tucows provides rated software that you can download from the internet.
Free software is called freeware.
Note that freeware and shareware usually has no support, and there is a risk of downloading viruses. So it is prudent to have good antivirus software and download from reputable sites such as this. Look at the current highest reviewed software - Head of the Heard . PDF stands for portable document format. Word processing formats such as word and wordperfect print differently on different printers.