Atmel AVR and 8051 series ISP programmer
AVRmini V4.0 - Development board with Ethernet/USB for 40-pin AVR processors (PDF)
AVRmini8 V1.0 - Development board for ATmega8, ATmega44, ATmega88,
Parallel AVR programmer
Several Atmel AVR programmer circuits
USBtinyISP - AVR programmer & SPI interface project
AVR In System Programmer