In browsing through a small collection of disks that I acquired from a former Amigan, I noticed a handful of disks from a collection called "PD Software Digest." It's old 1.x-era stuff - the disks range from 1987 to 1989 - and at a quick glance none of the programs are on Aminet. The only other references I can find to this library are someone selling a few disks a couple of years ago, and some OCR'd text from an advertisement in Amiga World magazine (I guess this technically makes it a diskmag rather than a PD library, but that's beside the point).
It got me thinking about other old PD libraries that are not generally known to the internet. Apart from the Fish collection, most (all?) of the currently archived libraries originate from Europe. There's a big missing gap in terms of what American non-commercial developers were producing in the early years. In addition to the Fish disks, I remember disks from a few other PD libraries kicking around when I was growing up.
While there's little practical value to the software (unless someone is running a 1.3 productivity system for giggles), it would be good to get more of this archived and preserved. It's an important part of Amiga history. I've made ADFs of the Software Digest in the meantime. Will see about getting them up on Aminet.