I’ve written hundreds of entries at Click, which at present is broken and can’t be added to. I’ve done dozens of Linux and BSD installs on various old PCs. Among them:
2001 Maxspeed Maxterm thin client — built around an ECS VIA C3 Samuel-based, nearly mini-ITX-sized motherboard, maximum of 256 MB RAM, built-in CF-to-IDE adapter (disconnected so I can run extra-long IDE cables to external drives outside the thin-client box), with IDE cable connected to TDK CD-RW drive and one of three 14.4 GB IBM hard drives.
1998 Compaq Armada 7770dmt laptop (aka the $15 Laptop) — 233 MHz Pentium II MMX processor, 64 MB RAM (max is 144 MB) no USB, no Ethernet, with swappable CD-ROM and floppy (not working) drives. With Orinco WaveLAN Silver PCMCIA 802.11b wireless card, plus original 3 GB IBM hard drive. Currently running Debian 4.0 Etch and Damn Small Linux 4.0 from CD.
2001-2 Gateway Solo 1450 laptop (aka the $0 Laptop) — 1.3 GHz Celeron M processor, 256 MB RAM (maximum 1 GB … if only I had the cash), 2 USB ports, built-in Ethernet, PCMCIA has bent pins and doesn’t work, floppy drive and DVD-ROM/CD-RW drive, with 30 GB Toshiba hard drive. Currently running Ubuntu 7.10 Gutsy and Debian 4.0 Etch.
And of course don’t forget This Old PC:
1998 generic white-box PC with baby-AT motherboard (??), 333 MHz Pentium II MMX processor, 256 MB RAM (maximum), 10 GB hard drive, CD-ROM (CD-RW was pulled for Maxspeed thin client), 15-inch LCD monitor, USB ZIP drive, Ethernet card (Airlink 101 wireless card doesn’t work and has been pulled). Currently running Windows 2000.