Amazon.com: CoCocina Teensy 2.0 Compatible USB Avr Development Board for Isp Atmega32U4 Geekcreit for Arduino - Products That Work with Official Arduino Boards : Electronics
Teensy 4.1 MIDI Breakout board 8in / 8out USB host from Deftaudio on Tindie
New Teensy 4.1 Arrives With 100 Mbps Ethernet, High-Speed USB, 8 MB Flash | Hackaday
Amazon.com: 2.0 USB Development Keyboard Teensy 2.0 USB Keyboard Teensy 2.0 USB AVR Board Green : Electronics
Teensy 4.1 with Ethernet - Assembled Pins | The Pi Hut