DIY Geiger Counter With an ESP8266 and a Touchscreen - Electronics-Lab.com
DIY Geiger counter – Dangerous Prototypes
Geekcreit Assembled DIY Geiger Counter Kit Module Miller Tube GM Tube Nuclear Radiation Detector Geekcreit for Arduino - products that work with official Arduino boards - EuDirect Shop
Arduino IDE DIY Geiger Counter Kit with eeprom logging or with SD Shield
ESP8266 powered DIY Geiger Counter | Embedded Lab
Modular DIY Geiger–Müller counter -
From HackSpace mag issue 14: DIY Geiger counters | Noise