For AVR programming, I have used MPLabX and found it fairly easy to use and program with. I do use their official programmer, even though it is expensive (it c

For AVR programming, I have used MPLabX and found it fairly easy to use and program with. I do use their official programmer, even though it is expensive (it can program AVR & PIC families) to avoid compatibility or driver issues. I have used PlatformIO in the past too, but nothing beats a custom made IDE designed for programming a core set of chips.