PJRC Teensy 4.0 (Without pins)
Micro Center - PJRC.COM Teensy 3.6 USB Development Board - Without Pins TEENSY3.6
Audio Adaptor Boards for Teensy 4.x
PJRC - RobotShop
pjrc — Cool Components
PJRC Teensy 4.1 ARM Cortex-M7 Microcontroller Australia
PJRC Teensy Prop Shield LC (No Motion Sensors) - RobotShop
PJRC-Teensy in Germany - Eckstein Shop
PJRC Teensy microcontroller modules - Manufacturers
Adding More RAM and Flash to the Teensy 4.1
PJRC Store sale! Audio shield Teensy #makerdeals @PaulStoffregen « Adafruit Industries – Makers, hackers, artists, designers and engineers!
Teensy 4.0 + Header Strip
Teensy 4.1 without Ethernet - development board with NXP iMXRT1062 ARM Cortex-M7 microcontroller (with connectors) - Kamami on-line store