Inno Setup is a free installer for Windows programs. First introduced in 1997, Inno Setup today rivals and even surpasses many commercial installers in feature set and stability.
# Support for every Windows release since 2000, including: Windows 8, Windows Server 2012, Windows 7, Windows Server 2008 R2, Windows Vista, Windows Server 2008, Windows XP, Windows Server 2003, and Windows 2000. (No service packs are required.)
# Extensive support for installation of 64-bit applications on the 64-bit editions of Windows. Both the x64 and Itanium architectures are supported. (On the Itanium architecture, Service Pack 1 or later is required on Windows Server 2003 to install in 64-bit mode.)
# Supports creation of a single EXE to install your program for easy online distribution. Disk spanning is also supported.
# Standard Windows 2000/XP-style wizard interface.
# Customizable setup types, e.g. Full, Minimal, Custom.
# Complete uninstall capabilities.
# Installation of files: Includes integrated support for "deflate", bzip2, and 7-Zip LZMA/LZMA2 file compression. The installer has the ability to compare file version info, replace in-use files, use shared file counting, register DLL/OCX's and type libraries, and install fonts.
# Creation of shortcuts anywhere, including in the Start Menu and on the desktop.
# Creation of registry and .INI entries.
# Running other programs before, during or after install.
# Support for multilingual installs, including right-to-left language support.
# Support for passworded and encrypted installs.
# Support for digitally signed installs and uninstalls.
# Silent install and uninstall.
# Unicode installs. (Windows 2000/XP or later)
# Integrated preprocessor option for advanced compile-time customization.
# Integrated Pascal scripting engine option for advanced run-time install and uninstall customization.
# Full source code is available (Borland Delphi 2.0-5.0 and 2009).