NSIS (Nullsoft Scriptable Install System) 3.10
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.
Nsis Nullsoft Scriptable Logiclib Safe Nullsoft Scriptable Install System Find Selectstringexact Open Source
Source: neowin.net