Can anyone introduce me to a cheap and simple SPI programmer that can program an Atmega 3.3 Volt and Compatible with Arduino?
Here you go:
https://www.ebay.com/itm/362431789222
You'll likely want to also buy a 10 pin to 6 pin ICSP adapter since all Arduino boards use the 6 pin ICSP header and that programmer has a 10 pin cable:
https://www.ebay.com/itm/161278354467
Another Arduino? (Running the "ArduinoISP" sketch, and suitably wired.)