Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Social Games in Slack - Polly brings your WFH team together with interactive games
Influitive - Influitive helps companies increase customer lifetime value and accelerate sales with the power of their own customer advocates. Inspire your customers to stay longer, share their experiences, and attract new business.
Flinkit! - Web-hosted team building games for small and large companies
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
Trivia for Google Chat - Team-building w/ fun quizzes, games right inside Google Chat