Emulates an stk500v2 through an FTDI FT232R USB to UART converter.
For programming Atmel AVR microcontrollers through Atmel's standard 6 pin in-system program header (ISP6PIN). All logic and power lines are at 5V supplied from the USB port.
This is an implementation of the tuxgraphics design. As such, the design is subject to GPLv2 requirements. The source code is available for download here.