Systems, I still use/gave away (some x86 systems under dev)
[8 bit]
Amstrad 6128
Commodore Plus/4, Commodore 64, Commodore 64c, Commodore 128, Commodore 128D
ZX81, ZX Spectrum 48k, ZX Spectrum Plus, ZX Spectrum 128k, ZX Spectrum +3
[16 /32 bit]
Archimedes A3000, Archimedes A5000
Amiga 500, Amiga 500+, Amiga 1200/060, Amiga 1200/030, Amiga 600/020, Amiga 4000/060
Atari ST 520, Atari STFM 1040
[Apple]
PowerBook Duo 210, PowerBook 1400c/G3, QuickSilver G4, iBook G4, macMini G4@1.42Ghz, OS9
[Workstations]
Sun SPARCStation LX [SunPC co-pro]
Compaq ALPHAServer DS10 (OpenVMS)
Silicon Graphics O2
486/66 : Win3.1/DOS/Unisys CTOS
SS7 board K6-450 : 98SE
micro-ITX via C7 : Amithlon Project
nano-ITX EMC-3412 Geode : 98SE
[IoT]
LILYGO TTGO VGA32 ESP32: CP/M
M5Stack Cardputer
M5Stack Plus2C
SMART Response XE (ATMega128RFA1 based hackable handheld)
Waveshare RP2350-GEEK : CP/M
[ARM SBC]
Pi4 : RISC OS
Pi0 W : Alpine Linux
[FPGA]
C-One : TurboCPC/SymbOS
ZX Spectrum Next
Tang 20k
[PDA]
Psion II LZ64, Psion 3a, Philips Nino 500, Palm M505, Clie TJ37, Psion Workabout, IPAQ 5550
Psion NetPad (wince), Dell Axim X30/624MHz, Dell Axim X51v/624MHz
Nokia N800(tablet)
[Consoles/handhelds]
Atari Lynx
GameBoy(w/ ActionReplay)
Gameboy Colour
GBA (backlit TFT mod)
GameBoy Micro
DS Lite
Wii