of the openwince-jtagtools (added features are ejtag support,
bsdl file import and svf player, probably more)
I've added a minimal driver for the "usbprog" adapter. It needs the
"usbprogJTAG" firmware which is not distributed in binary
by the developers but can be easily built with pkgsrc/cross/avr-gcc.
(There is some "openocd" firmware which looks similar, it might be
possible to make this work.)
Caution: The usbprog adapter does no Vref sampling but drives always 5V.
Make sure your taget device tolerates that. (I've tested with a PIC32
eval board.)