It has a small cost (30$) for large HD download but you can already get a good rendering
Trivia for Google Chat - Team-building w/ fun quizzes, games right inside Google Chat
Cheese Posties - Ready-to-grill cheese sandwiches in the mail
Social Games in Slack - Polly brings your WFH team together with interactive games
Visual Beat - Interactive music video
Flinkit! - Web-hosted team building games for small and large companies
Owlead - Grow your Twitter with valuable followers, effortless