kmap12

[Menu]   A   B   C   D   E   F   G   H   I
Download kmap12.exe (Windows only) from here.
kmap12.exe - Karnaugh Map 1.2 - Russell Sasamori [puz.com]
It can be copied to any folder and run directly.

The layout used here is highly recommended.
The program shows NOT A as /A. These tutorials use the notation A'.

NOTE: The View menu allows a choice from SOP /SOP POS or /POS.
There is no obvious indicator in the menu to show which is selected.
Don't change it - leave it on the default SOP (Sum of Products).