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
AVR-JTAG-USB-A Olimex Ltd. | Mouser
ARM-JTAG-SWD Olimex LTD | Development Boards, Kits, Programmers | DigiKey
MSP430-JTAG-RF (Olimex) WIRELESS USB JTAG FOR PROGRAMMING AND FLASH EMULATION