Pen pal programs endure in a digital age

I can give a recommendation for /r/fountainpenpals, if you're into fountain pens. And if not, check out/r/fountainpens or the fountainpennetwork forum and get into it, it's fun and doesn't have to be expensive :)

Are there no posted birthday cards in Denmark any more?

Postcrossing still pretty much alive ans thriving

I met my wife in Slowly. I can't reccomend it enough for a Pen pal experience.