BASCOM supports the following programmers
AVR ICP910 based on the AVR910.ASM application note
STK200 ISP programmer from Atmel
The PG302 programmer from Iguana Labs
The simple cable programmer from Sample Electronics.
MCS Universal Interface Programmer
The MCS Universal Interface supports a number of programmers as well. In fact it is possible to support most parallel printer port programmers.
STK500 programmer and Extended STK500 programmer.
USBprog Programmer / AVR ISP mkII (AVRISP)