Hacker conference JawnCon 0x3 has made an interactive event schedule using HyperCard, software first released in 1987.

Its website runs a 68k emulator with a Macintosh Plus inside the browser, and HyperCard runs inside that machine. A conventional web schedule is also available.

A simulator reproduces a Commodore 64 motherboard down to component pins and electrical connections. Remove a chip or disconnect a pin on screen, and the virtual machine responds to the resulting fault.

Creator Salvatore Sanfilippo, known as antirez, built it to investigate problems without risking an old computer. The detailed simulation runs at about 31% of a real C64's speed even on an Apple M3 Max.

Project Infin_IT is a portable computer shaped like a boombox. The two front panels that resemble speakers are actually removable wireless keyboards. At the back, an SSD is housed in a cassette-shaped cartridge.

Maker Watt IV combined a Framework Laptop 12 mainboard with a salvaged iPad screen and webcam. The carrying handle also doubles as a stand.

An external expansion adds typed and spoken AI conversations to a working 1989 Atari Portfolio while retaining its original keyboard and LCD. The device can also describe camera images and play internet radio.

Maker Davide La Sala uses an ESP32-based external module for networking, audio and camera functions, with the AI accessed online. The language model does not run on the vintage computer itself.

ESP-Vim runs Vim 9.2 directly as firmware on ESP32-S3 and ESP32-P4 microcontrollers, without Linux or another operating system underneath. On a board with a display and keyboard, it becomes a small computer dedicated to editing text.

Beyond editing files, it includes Git, MicroPython, SCP/SFTP and a web interface accessible from Vim. The project currently reports testing the ESP32-P4 and ESP32-S3 in an emulator; physical boards have not yet been tested.

GB Test Lab is a diagnostic cartridge for the original Game Boy. It checks functions including memory, interrupts, cartridge-slot lines and button contacts, while its Quick Check runs several autonomous tests in under a minute.

Results can be stored per console, and a connected Game Boy Printer can produce a six-page report on thermal paper. The cartridge also contains twenty reference articles explaining Game Boy components and symptoms.

PickentCode built a computer powered entirely by a small Stirling engine heated by an alcohol lamp. Instead of a wall outlet or battery, the flame keeps a generator turning to power an ESP32-C3 and a small OLED display.

A 16-key keypad lets the machine run CHIP-8 games and custom programs. To stay within the tiny power budget, wireless features are disabled and the processor speed is reduced when full performance is not needed.

Since its 1993 release, DOOM has been ported to countless devices that were never intended to be game consoles, including digital cameras, printers and pregnancy-test hardware. The 1997 release of the game's source code, together with an architecture that made platform-specific parts relatively replaceable, helped turn porting DOOM into a widespread hacking tradition.

As unusual ports spread through YouTube and social media, getting DOOM to run became less a practical benchmark and more a trophy for technical ingenuity. Recent projects have connected the game to hardware as unlikely as satellites and models of a fly's nervous system, stretching even the question of what it means for a device to 'run DOOM.'

Peter's Homebrew 16 bit relay computer is a 16-bit CPU built from electromechanical relays. Running a program that calculates pi to two decimal places requires 1,377 instructions and a little over eight minutes. The creator calls it the 'slowest computer in the world.'

It has a 19-instruction set built around an accumulator, and in 2026 gained a 32×32 LED matrix connected as memory-mapped video output.

Casio's 1995 Loopy game console includes a built-in thermal sticker printer for printing images from games. Throaty Mumbo's LoopyDOOM port makes that unusual hardware feature available to DOOM too: an option in the menu prints the current game frame.

DOOM itself runs on the real 16 MHz SH-1 hardware with roughly 512 KB of RAM at around 8–15 fps. Running DOOM on odd hardware is already a familiar challenge; this port goes a step further and treats the console's printer as a feature DOOM ought to support too.

Throaty Mumbo published a patch for the original Super Mario Bros. that lets two Famicoms communicate through Nintendo's old Famicom Network System.

The setup calls for two consoles, two network units, compatible flash cartridges and phone cabling. The live demo uses a telephone-line simulator, while the README notes that a real landline might work as well. It is a 2026 multiplayer experiment whose networking stack has traveled conspicuously backward in time.

RotaryCell turns an old rotary telephone into something you can carry away from the phone line and use over a cellular network. The original handset, dial, switch hook and mechanical bell remain intact: dial a number normally and it places a mobile call; receive one and the old bell rings.

Maker fregacmols fits an ESP32-S3, cellular modem, battery and circuitry that imitates the telephone exchange the vintage phone expects. Rather than teaching the 1950s hardware new behavior, the project miniaturizes enough of its old infrastructure to make the phone feel at home on LTE.