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.
Synoomy - Synoomy app provides features through which users can discover new cultures and communities as well as can also improve their language skills by making new friends.
Unbordered - Unbordered app comes up with features to help you in finding the perfect language practice and exchange partners so you can practice foreign languages right through your mobile phone.