SFXMaker is a tool used to create switchless installers or a silent installer.
A quick word on terminology: Strictly speaking, an unattended installation is one which does not require user interaction, and a silent (or quiet) installation is one which does not display any indication of its progress.
Here, we are interested not only in performing unattended installations, but also in waiting for those installations to finish and suppressing any reboot they might want to perform. This is necessary for reliably installing multiple applications.