If you haven't already, you should check out Kind Words, a game cenetered on sending and receiving nice messages to strangers through the internet. You get to do personalized requests if you have anything going on that you want some positivity on. People can then reply specifically to that prompt. You of course can also answer other people's requests, or not if you don't feel like it. There's also the paper airplanes which are messages that you can send out completely randomly just to put a little light in a stranger's day. You of course can also look at the random messages.
It has a surprisingly amazing community with really good moderation. The art and music also create a great vibe.
