Flinkit! - Web-hosted team building games for small and large companies
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.
Social Games in Slack - Polly brings your WFH team together with interactive games
Yochat - Yochat app enables users to get to know about strangers from a large number of countries from around the world by video chatting with them.
Trivia for Google Chat - Team-building w/ fun quizzes, games right inside Google Chat
Anygram - Anygram app offers features that let you meet new people so you can make new foreign friends practice native languages to learn something new.