Anything copyrighted can still not be downloaded free legally unless the author has made the software available for download.

Of course, it can be hard to find the originals now and I would argue that sharing the games at least prevents them from disappearing due to bit rot.

The iPhone C64 emulator seems very lacking in games. I think the modplayer for the iPhone has the right idea, build in a web browser so you can download the files into the software.