NSIS: Home: "An installer is the first experience of a user with your application. Slow or unsuccesful software installations are the most irritating computer problems. A quick and user friendly installer is therefore an essential part of your software product. NSIS (Nullsoft Scriptable Install System) is a tool that allows programmers to create such installers for Windows. It is released under an open source license and is completely free for any use. More about NSIS features..."