http://github.com/cyphunk/RS232enum
Arduino based RS-232 scanner
Arduinull
http://deadhacker.com/2010/02/03/jtag-enumeration/lekernel.net/blog/?p ======319
“The first simplified scanner running all in the microcontroller. ”
JTAGenum
https://github.com/cyphunk/JTAGenum
Arduino based JTAG scanner
Branches
http://github.com/jal2/JTAGenum
http://new.hackerspace.be/JTAG_pinout_detector
JRev
http://nsa.unaligned.org/jrev.php
“Not meant for scanning pins to find JTAG. It does however implement some logic not in any of the JTAG scanners mentioned here. In particular, support for chain mapping and perhaps others I’m missing. ”
JTAG Finder
http://www.c3a.de/wiki/index.php/JTAG_Finder
“the microcontroller provides a pin protocol/interface to a C client running on the PC which does the actual scanning logic. This was one of the first (if not the) JTAG scanner. It trades simplicity of code and protocol for efficiency and speed”