PenPal World - Connect with people all over the world
Frysbe - Frysbe: Make global friends at random and the fling app comes up with features to send messages to strangers from every corner of the world to expand your social circle.
Random PenPals - Get a quarantine PenPal in 10 seconds
Airtripp:Free Foreign Chat - Airtripp:Free Foreign Chat is a social app by Kiheitai Inc.
Polyglot Club - Polyglot Club is a new social network for language learners.
WeSpeke - WeSpeke is an online writing community that connects people around the globe through letter-writing.