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
ARM USB JTAG DEBUGGER
Appnotes and Tutorials about Debugging UEFI and Linux Kernel on Intel SoCs with OpenOCD and ARM-USB-OCD-H or ARM-USB-TINY-H | olimex
ARM-USB-OCD
OLIMEX ARM-USB-OCD-H USB JTAG DEBUGGER | eBay
OLIMEX ARM-USB-OCD-H USB JTAG DEBUGGER | eBay
JTAG USB OCD Tiny - Programmer/Debugger for ARM processors - PGM-08278 - SparkFun Electronics