tuxgraphics.org: 05101, AvrUsb500 -- an open source Atmel AVR Programmer, stk500 V2 compatible, with USB interface
Building STK500 AVR ISP programmer with USB - Do It Easy With ScienceProg
Atmel AVRISP STK500 USB ISP Programmer - Seeed Wiki
Amazon.com: Based on ATMEL Official STK500 USB AVRISP CH AVR ISP high Speed Programmer Compatible with at AVRISP from ATMEL Supports AVR Studio 4/5/6/7 ISP_6PIN Interface @XYGStudy : Electronics
Difference between "STK500 ISP" and "AVRISP2 | AVR Freaks