The HackBerryPiCM5 is a handheld computer with a 4 inch, 720 x 720 pixel touchscreen display, a repurposed BlackBerry keyboard, and and a Raspberry Pi Compute Module 5 inside, allowing you to use the device as a portable Linux computer. It's the latest line of open source, Raspberry Pi + BlackBerry handhelds from ZitaoTech. While this model is not yet available for purchase from…

Mecha Comet is a modular handheld Linux computer that connects to Raspberry Pi Hats and other snap-on modules. It runs on Mechanix OS.

The Pilet 5 is a Raspberry Pi 5-powered handheld computer with a 5 inch display, a built-in keyboard, and a set of buttons, joysticks, and scroll wheels for navigation and gaming. And the Pilet 7 is a portable computer with a larger display and a modular design: you can attach a keyboard, gamepad, or other accessories to the bottom. Both are open source hardware projects that have been…

The Interrupt is a handheld computer with a QWERTY keyboard for thumb typing, a 3.5 inch IPS LCD color display, and a Kali Linux-based operating system. But while you can use it as a general purpose device, it's really designed as a sort of Flipper Zero-like system for tinkering with nearby wireless devices. In addition to WiFi 5 and Bluetooth, the handheld has a CG1101 sub 1 GHz radio, NFC and RFID support, and an IR receiver.

The GPD MicroPC 2 is a little computer that looks a lot like a laptop, but it's designed to be used more like a palmtop. Hold it in  two hands and you can reach your thumbs across the QWERTY keyboard for 2-finger typing. But you can also twist the 7 inch FHD touchscreen display and fold it down over the keyboard for use in tablet mode.

The Mecha Comet is a modular handheld Linux computer featuring a modular input section below a 3.92 inch AMOLED display, allowing you to swap out a QWERTY keyboard for a gamepad, I/O board, or other modules. After first introducing the device a year ago, the makers of the Mecha Comet have now launched a Kickstarter crowdfunding campaign with Early Bird reward levels starting at $189 for an entry-level model.