The popular Olimex ARM OpenOCD JTAG programmer debugger ARM-USB-OCD-H gets better, now has a modification which works with targets from 0.65 up to 5.5V | olimex
Debugging ESP8266 firmware with Olimex ARM-USB-OCD-H – VisualGDB Tutorials
OPENOCD(OLIMEX ARM-USB-OCD-H) + STM32 - HOW TO CONNECT? - YouTube