X (Twitter) - Connect with your friends and other fascinating people. Get in-the-moment updates on the things that interest you. And watch events unfold, in real time, from every angle.
PenPal World - Connect with people all over the world
Minds - The open-source, encrypted social network that expands your reach for using it.
Airtripp:Free Foreign Chat - Airtripp:Free Foreign Chat is a social app by Kiheitai Inc.
Gab - Gab is an ad-free social network dedicated to free speech.
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.