Main Page | See live article | Alphabetical index Nullsoft Scriptable Install System (NSIS), is an open-source, script-driven installation system being backed by Nullsoft, creators of Winamp. NSIS is, for all intents, an open source copy of the "classic" Windows installer system. Website: http://www.nullsoft.com/free/nsis/ This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.