Here are some more nRF51822 modules that are breadboard-friendly, from Adafruit and Sparkfun. They're just the ones I found from 5 mins searching: https://www.

Here are some more nRF51822 modules that are breadboard-friendly, from Adafruit and Sparkfun. They're just the ones I found from 5 mins searching: https://www.sparkfun.com/products/13729 https://www.sparkfun.com/products/13729 https://www.adafruit.com/products/2479 https://www.adafruit.com/products/2479 https://www.adafruit.com/product/2633 https://www.adafruit.com/product/2633