Public Domain CD images

Back in the 90s I bought a fair number of CDs, mostly Infomagic and Walnut Creek. It's how I first got a copy of RedHat. I've thrown away most of them, but I found a few in my basement.

The Complete GNU Software Library, September 1994 ISO Image File System
Project Gutenburg, April 1994 ISO Image File System
Simtel-20 Archives, March 1994 Disk 1 Image
Disk 2 Image
File System
Source Code CD-ROM, March 1992 ISO Image File System
X11R5 Sources, December 1992 ISO Image File System