Related devices, where related mostly means "a computer that plugs into a USB port", roughly in recency order: - Serpente, $15 Cortex-M0+ https://www.tindie.co

Related devices, where related mostly means "a computer that plugs into a USB port", roughly in recency order: - Serpente, $15 Cortex-M0+ https://www.tindie.com/products/arturo182/serpente-a-tiny-circuitpython-prototyping-board/ https://www.tindie.com/products/arturo182/serpente-a-tiny-ci... - Somu, $35 Cortex-M4 https://www.crowdsupply.com/solokeys/somu https://www.crowdsupply.com/solokeys/somu - Fomu, $50 ICE40UP5K https://www.crowdsupply.com/sutajio-kosagi/fomu https://www.crowdsupply.com/sutajio-kosagi/fomu - GL.iNet GL-USB150, $30 MIPS 24K https://www.gl-inet.com/products/gl-usb150/ https://www.gl-inet.com/products/gl-usb150/ - Bash Bunny, $100 Cortex-A7 https://shop.hak5.org/products/bash-bunny https://shop.hak5.org/products/bash-bunny - Espruino Pico, $25 Cortex-M4 https://www.espruino.com/Pico https://www.espruino.com/Pico - IceStick, $25 ICE40HX1K https://www.latticesemi.com/icestick https://www.latticesemi.com/icestick