Win32s

Win32s is an installable add-on for Windows 3.1x, which enables 16-bit Windows to run some 32-bit executables. While it includes portions of Win32 API, they're very minimalistic and insufficient for most 32-bit applications to run properly.

It also includes the famous game called Freecell, which was meant to demonstrate a 32-bit app running on 16-bit Windows.

Known versions:

• Oct. 1992 Beta (floppy and CD)
• 1.0 (1.0.61 Beta - floppy and CD)
• 1.1 (1.1.88 - Developer, MSVC32s and floppy)
• 1.1a (1.1.89 - floppy)
• 1.15 (1.15.103 - floppy)
• 1.15a (1.15.111 - floppy)
• 1.20 (1.20.123 - Developer, floppy and CD)
• 1.20 (1.20.127 - floppy)
• 1.25 (1.25.141 - floppy, CD and OLE2)
• 1.25a (1.25.142 - CD and OLE2)
• 1.30 (1.30.140 Beta - floppy)
• 1.30 (1.30.152 Beta - floppy)
• 1.30 (1.30.152 - floppy)
• 1.30 (1.30.159 - floppy)
• 1.30a (1.30.166 - Developer, floppy, CD and OLE2)
• 1.30c (1.30.172 - Developer, floppy and CD)