Total Network Inventory: Professional PC audit and network inventory management software - fits best for a for companies of all sizes. Free for 60 days.
Inno Setup - Inno Setup is a free installer for Windows programs.
Network Inventory Advisor - Network Inventory Advisor audits all network software and hardware simply and efficiently
NSIS - NSIS (Nullsoft Scriptable Install System) is a professional open source system to create Windows...
Lansweeper - Lansweeper discovers Windows, Linux and Mac machines in your network.
InstallForge - A very simplistic and streamlined program for creating installation files.
Nmap - Nmap Free Security Scanner, Port Scanner, & Network Exploration Tool. Download open source software for Linux, Windows, UNIX, FreeBSD, etc.