https://www.lyonlabs.org/commodore/
https://www.lyonlabs.org/commodore/onrequest/collections.html - Programming languages
Online C64 emulator
https://c64emulator.111mb.de/index.php?site=pp_javascript&group=c64
Software
https://commodore.software/downloads/category/80-disk-file-transfer-tools
https://www.planetemu.net/machine/commodore-64