Thanks for posting this
According to the post these application were developed by
Dave Hock. (I didn't know that).
On 2002 I contacted Dave Hock and he gave permission to republish his VisPro software as "AS IS Freeware". He didn't have the source code, he is afraid he lost is on an HDD crash.
Since those application were produced on his IBM days, I guess IBM retained the permission for that software.
Regards