Macintosh OSX tech support request

[squamous]

Any recommendations of a simple, free image editor available for Mac OSX that can be used to easily create LJ icons and the like...? I think I asked this before; sorry. I used to use IrfanView (or something like that) on Windows... it was free and very easily let me crop and resize an image to make cramped, puzzling icons out of other people's beautiful artwork. Making lame little icons seems to me like a Mac 'thing' but I have been out of the Mac loop for like 10 years now and am still getting back up to speed on how things are done these days. Maybe I should just search for a tutorial online somewhere and leave you the hell out of my damn problems.