TaFWeb Software - ScriptMaker
- A visual tool to generate the IS script for an install procedure.
- http://www.tafweb-trainz.co.uk/tafwebsw/scriptmaker.html

Inno Setup
- A powerful script based freeware installation builder with Delphi source available. By Jordan Russell.
- http://www.jrsoftware.org/isinfo.php

Inno Setup Preprocessor
- An add-on which allows to conditionaly compile parts of scripts, use compile time variables in the script, and use built-in functions for reading registry and INI files at compile time.
- http://sourceforge.net/projects/ispp/

InnoSetup Extensions Knowledge Base
- A help for programmers to make installer packages using Inno Setup Extensions featuring news, articles and a list of related links.
- http://www.vincenzo.net/isxkb/

My Inno Setup Extensions
- Adds Pascal scripting as well as child components and tasks support to Inno Setup, uses a modern looking Setup icon and comes bundled with the Inno Setup Preprocessor.
- http://isx.wintax.nl/

Iwz2iss Homepage
- Converts InstallShield's IWZ project files into InnoSetup's ISS files. Download and information about IWZ features which are not supported.
- http://mikequ.webpark.pl/eng/iwz2iss.htm

ISTool
- A tool to edit IS scripts in a visual environment. Additional enhancements available for IS are a DLL to load parts of the installation from the internet and a DLL to display billboards during the installation process.
- http://www.istool.org/