UrJTAG，born out of the openwince project's JTAG Tools，supports a large set of inexpensive IEEE 1284 parallel printer port and USB JTAG cables
JTAG-ARM9 provides a JTAG access program for the ARM9 processor.
JTAG for the LART aimed at the LART processor
JTAG base layer is an attempt at creating a JTAG library
The uCLinux for Blackfin project have a JTAG-backend for the GNU Debugger and a JTAG Tools version specifically for Blackfin based on the openwince work
JTAG toolkit is a free software JTAG tool suite, including API library and several examples
OpenOCD is an GPL Open Source GDB Server that currently supports ARM7 and some ARM9 Targets
JTAG ScanWorks JTAG development systems.
JTAG DFT Analysis JTAG Design for Test software.
JTAG Technologies Test and programming development systems.
TopJTAG Probe Interactive JTAG/boundary-scan software for circuit debugging and visualization.
Green Hills Software MULTI Debugger and Green Hills Probe, Software and hardware supports JTAG and BDM based development on ARM, XScale, PowerPC, MIPS, ColdFire, Blackfin, ARC, TI C6000, v800, StarCore, SH, M32R, and LSI ZSP.
Ronetix PEEDI, JTAG Emulator and Flash Programmer for ARM7/9, XScale
SEGGER Microcontroller Systeme GmbH j-link, USB to JTAG interface for ARM cores（J-Flash, J-Mem, RDI Pro Bundle）
SEGGER Microcontroller Systems LLC j-trace, a USB to Trace Mictor and JTAG interface for ARM cores
Lauterbach Datentechnik GmbH produce JTAG-based in-circuit emulators the most popular being TRACE 32
Macraigor Systems LLC JTAG Commander and OCD Commander
Abatron AG's BDI-2000 acts as a GDB server on your LAN, giving you source-level debugging via JTAG.
JTAG Emulator Embedded Toolsmiths Guardian-SE JTAG Emulator connects a GDB server on your LAN to the JTAG interface on PowerPC, MIPS, XScale and Arm Processors. This allows: JTAG FLASH Programming, JTAG Emulation and JTAG source-level debugging via JTAG for PowerPC, MIPS, XScale and ARM Processors.