Thursday - Thursday is where remote teams do their socials.
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.
Trivia for Slack - Fun team-building with 1000s of quizzes right inside Slack
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.
Flinkit! - Web-hosted team building games for small and large companies
PenPal World - Connect with people all over the world