Inno Setup is a free script-driven installation system for creating Windows installers. It allows developers to package their applications into a single executable file, making it easy for users to install software on their computers. The tool supports various features, including custom installation options, multilingual support, and the ability to create shortcuts. Developed by Jordan Russell, Inno Setup has been widely adopted due to its simplicity and flexibility. It uses a Pascal-based scripting language, enabling advanced customization for installation processes. The software is suitable for both novice and experienced developers looking to streamline their application deployment.