Any software archive or DL sites / links for old software ?

[J911]

I have some time to kill in the -13C and I have a couple of vintage computers to ressurect. One is a Tandy with 12"monitor and the other is a IBM with a keyboard and a tiny ~8" monitor built in, in a suitcase format. I'm clueless where to begin and how to try to eventually get sofware on them. They both have 5 1/4 floppies.  Thanks ahead if you know something.

[berke]

https://winworldpc.com/library/operating-systems