Jeff Harris recently identified a severe problem with Slack: there isn’t a client for the Commodore 64. I know, crazy, huh? So, he decided to write one in 6502 assembly. Using a C64 Userport device, he’s connected the Commodore to a Raspberry Pi which is, in turn, connected to the Internet and the Slack API via NodeJS. You can read how he did it and get hold of the software here. A demo is below: