[Trial & Licensing] These authoring tools can create Windows Installer Packages.
OnDemand Software has been involved with the Windows Installer and MSI since 1997, when they provided Microsoft a free packaging solution to ship alongside of Windows 2000 (then called Windows NT 5.0). For ONLY creating windows installer packages, they have mainly two flavors of products:

[Description from vendor]

• WinINSTALL LE: The first MSI Packager ever developed. WinINSTALL LE shipped on the Windows 2000 (Professional and Server) CD when Windows 2000 was released, and paved the way for full featured WinINSTALL MSI Packager Professional Edition. It is the low-cost solution to create and edit MSI packages. For those with more complex requirements, OnDemand also provides complete desktop management solutions, as well as a professional, award winning MSI Packager Professional edition.
  
• WinINSTALL MSI Packager Professional: WinINSTALL MSI Packager Professional Edition provides the only administrative approach to MSI packaging. WinINSTALL has long been known as the leader in packaging and distribution. Our MSI packaging technology is considered the most reliable packaging product on the market and is priced below other developer focused MSI packaging tools.