NSIS (Nullsoft Scriptable Install System) is a professional open-source tool for the development of Windows installers. It is designed to be as small and flexible as possible and is therefore highly suitable for internet distribution.
NSIS 2.45 is released. This long overdue version adds support for Windows 7 and comes with the usual knick knacks. Enjoy.
Download:
http://nsis.sourceforge.net/Download
Release notes:
http://nsis.sourceforge.net/rn/688043