Prototyping Breakout Boards

SparkFun

SOIC to DIP Adapter - 8-Pin (BOB-13655)

ElecFreaks

Basic:bit for BBC micro:bit - Three-Way I/O Expansion

SparkFun

SOIC to DIP Adapter 20-Pin (BOB-00495)

Cool Components

Teensy LED Controller

Generic / OEM

Teensy Prop Shield - LC - Low Cost (no Motion Sensors)

Arduino

Arduino MKR Mem Shield

Sparkfun Electronics

Gas Sensor Breakout

Adafruit

Terminal PiCowbell for Pico - Reset Button & STEMMA QT (ID:5904)

Sparkfun Electronics

Buck Regulator Breakout - 1.8V (AP3429A)

Pimoroni

Breakout Garden pHAT

Sparkfun Electronics

ESLOV to Qwiic Bridge

Arduino

Arduino MKR THERM Shield

Pimoroni

Breakout Garden HAT