Also my daily driver for any bitmap-related operations.
One little thing that became my muscle memory over the years is using it to view/edit/crop latest clipboard entry, most often screenshots, through simple hotkey (olden AutoHotkey) launcher with `/clippaste` command line parameter.
; open / view current clipboard in irfanView
; win alt i
#!i::run,path\to\IrfanView\i_view32.exe /clippaste