nRF52840 USB Key with TinyUF2 Bootloader - Bluetooth Low Energy [MDBT50Q-RX] : ID 5199 : $15.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Arduino USB key lets you Login into Windows, Twitter, and Gmail with just a Push of a Button
Amazon.com: Ximimark 3pcs ATTINY85 General Micro USB Development Board for Arduino : Electronics
Arduino Uno and USB Host Shield Keyboard - Programming Questions - Arduino Forum
Free shipping ! New keyestudio Touch Key USB shield for arduino - AliExpress Electronic Components & Supplies
GitHub - chris408/digispark-usbkey-board: Digispark ATtiny85 USB key "rubber ducky" clone