atari archives
Well, back in the 1980s I was in the other camp, because I was a proud owner of a C64—and we somehow looked down on those having an Atari. But that is history, and exactly from that point of view ↑atariarchives.org is very worthwhile, as it “makes books, information, and software for Atari and other classic computers available on the Web. Everything here is available with permission of the copyright holders.”