IF Magazine
archive.org
archive.org
I wouldn't mind if some of the current sci-fi magazines would let me open to a reading view like this, and then hide the controls: https://archive.org/stream/1967-12_IF#page/n5/mode/2up
2) If you wanna do a big bulk download for your favorite e-reader, here are the instructions.
https://blog.archive.org/2012/04/26/downloading-in-bulk-usin...
EDIT: apparently no, the .mobi are quite terrible, but the .txt version is ok. Weird.