This reminded me of a random HN submission. Someone was reading a terms of service agreement out loud. And I think that audio was like 20 minutes long, and only a minor joke in the background of a webpage that was an even bigger joke or parody. Does that sound familiar to anyone?
POP, for which I implemented a client. A webapp to read your mail. In C. Awful to our modern ears, but the functionality was something of an achievement at the time.