Atari800 source code and binary packages are on GitHub releases.
Binary packages typically take a few days to be built and uploaded, so please check back occasionally or follow the announcements on our mailing list.
Atari800 for Android is named Colleen and is available on Google Play.
Colleen's Help Page is right here and is continually updated.
Link to the PC Xformer Classic 3.8 (contains legally obtainable Atari ROM files)