Nullsoft Scriptable Install System for Windows

Nullsoft Scriptable Install System (NSIS) is a professional open source system to create Windows installers. It is designed to be as small and flexible as possible and is therefore very suitable for internet distribution. NSIS is script-based and allows you to create the logic to handle even the most complex installation tasks. Many plug-ins and scripts are already available: you can create web installers, communicate with Windows and other software components. Its features include:

• Generates self-contained executable installers
• Support for ZLib, BZip2 and LZMA data compression (files can be compressed individually or together)
• Uninstall support (installer can generate an uninstaller)
• Customizable user interface (dialogs, fonts, backgrounds, icons, text, checkmarks, images etc.)
• Classic and Modern wizard interface
• Fully multilingual, support for multiple languages (including RTL languages) in one installer. More than 40 translations are already available, but you can also create your own.
• Page system: You can add standard wizard pages or custom pages
• User selection of installation components, tree for component selection
• Multiple install configurations (usually Minimal, Typical, Full), and custom configuration
• Installer self-verification using a CRC32 checksum
• Small overhead over compressed data size (34 KB with default options)
• Ability to display a license agreement in text or RTF format
• Ability to detect destination directory from the registry
• Easy to use plug-in system (lots of plug-ins for creation of custom dialogs, internet connections, HTTP downloading, file patching, Win32 API calls, etc. are included)
• Installers can be as large as 2GB
• Optional silent mode for automated installations
• A preprocessor with support for defined symbols, macros, conditional compilation, standard predefines
• A lovely coding experience with elements of PHP and assembly (includes user variables, a stack, real flow control, etc.)
• Installers have their own VMs that let you write code that can support: