Social Games in Slack - Polly brings your WFH team together with interactive games
Sass - Syntatically Awesome Style Sheets
Flinkit! - Web-hosted team building games for small and large companies
PostCSS - Increase code readability. Add vendor prefixes to CSS rules using values from Can I Use. Autoprefixer will use the data based on current browser popularity and property support to apply prefixes for you.
Trivia for Google Chat - Team-building w/ fun quizzes, games right inside Google Chat
Stylus - EXPRESSIVE, DYNAMIC, ROBUST CSS