Thanks to the Run Up-to-date Linux Everywhere (RULE) project, “old hardware” does not necessarily mean “obsolete.” Their motto, in fact, is “Hardware is only as old as the software it runs.” RULE accomplishes this by taking the Red Hat 8 and 9 (and soon Fedora) installer and packages and modifying them to get them working on older equipment. The Slinky installer, for example, will run in as little as 8MB of RAM.
The goal here is twofold: 1) to keep aging/obsolete hardware out of the landfills and 2) to allow for the donation of older equipment to non-profits and small schools without forcing them to cope with outdated software. At the same time, the goal is to provide a full, working desktop on these machines, not just relegate it for use as a router, firewall, or dumb terminal.
If you’ve got some ancient hardware sitting in a closet, drop by the RULE page and take a look. Even if you don’t have a use for it yourself, maybe the parochial/private/rural school district down the street can get some use out of it.