NSIS (Nullsoft Scriptable Install System) is FREE to create Windows installers.
Editor: NSIS (Nullsoft Scriptable Install System) is a professional open source system to Create Windows installers. It is designed to be as small and flexible as possible and is therefore very suitable for internet distribution.
Being a users first experience with your product, a stable and reliable installer is an important component of succesful software. With NSIS you can create such installers that are capable of doing everything that is needed to setup your software.
NSIS is script-based and allows you to create the Logic to handle even the most complex installation tasks. Many plug-ins and scripts are already available: you can create web installers, communicate with Windows and other software components, install or update shared components and more.
NSIS can create Windows installers that are capable of installing, uninstalling, setting system settings, extracting files, etc. Because NSIS is based on script files, you can create both simple and advanced installers.
You can create a single installer that is compatible with Windows 95, Windows 98, Windows ME, Windows NT, Windows 2000, Windows XP, Windows Server 2003 and Windows Vista.
Unique compression methods
You can choose Between three different integrated compression methods (ZLib, Bzip2, LZMA). The new LZMA compression gives better results than any other common compression method. You dont have to use large self-extracting archive modules or other applications. The compression support is included in the 34 KB overhead.
NSIS 2.30 is released. This release brings you a beta of Modern UI 2 which, among other things, now makes use of the now documented nsDialogs. As always, you also get the bug fix and various improvements combo with no extra charge. you can free download NSIS 2.45 now.