This page lists some of the commonly used installers, and how to make them install without asking the user for anything:

If someone has a great way to find out what kind of instaler a particular setup file is made with, i would welcome that. Right know i sometimes have to go to the installer source of a particular project to find out which installer system they use.

Inno Setup

homepage

<installer.exe> /silent

Great installer by the way, used by Vaca!

NSIS (Nullsoft Scriptable Install System)

homepage

<installer.exe> /S

MSI (Microsoft Installer thingy)

<installer.msi> /quiet