Mattermost - Mattermost is an open source alternative to Slack.
Frets on Fire - Bonus content.
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Audiosurf - Audiosurf is a music-adapting puzzle racer where you use your own music to create your own experience.
Slack - A messaging app for teams who see through the Earth!
Rez - Rez is Music, Rail Shooter and Single-player video game developed by United Games Artists and published by List.