ZFax is fax software that allows users to use their Zaurus to send and receive fax, which is why Zfax is also called a GUI frontend for efax within the platform Zaurus SL5500 Linux PDA. This software features sharing of phonebook to the internal address book as well as it also features manual dialing. It also comes with a feature called external tiff viewer, by which users can save images no matter what format they are saved in. ZFax also features a Shell processing where it does every system call and makes process management an optional task. The tiff viewer that this software features gives users the ability to export TIFF images in different format, such as JPG, BMP, etc. ZFax is also known to be exclusively built for Zaurus and SharpROM, and features such as English screenshots, log viewer, converter, as well as favorite places editor are currently being equipped for Zfax to help Zaurus users in easily faxing their documents via Zaurus.