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.
Updated April 15, 2014
The Inno Setup QuickStart Pack includes Inno Setup itself, an option to install the unofficial Inno Script Studio script editor and an option to download and install official encryption support.
Updated March 05, 2014
Inno Setup zlib, bzlib and lzma compression source code - see issrc repository for lzma2 compression source code
Updated October 08, 2011