ISTool
- http://www.istool.org/
- 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.
Inno Setup Preprocessor
- http://sourceforge.net/projects/ispp/
- 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.
My Inno Setup Extensions
- http://isx.wintax.nl/
- 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.