Materia - Materia is a development environment to build advanced mobile and web applications.
Trivia for Google Chat - Team-building w/ fun quizzes, games right inside Google Chat
adapta-gtk-theme - An adaptive Gtk+ theme based on Material Design Guidelines - adapta-project/adapta-gtk-theme
Ricotta Trivia - Engage your remote team with some Trivia and Icebreakers on Slack. Run a quiz on Slack, answer Icebreaker questions or play games such as This or That, Two truths and a lie and more.
Zukitwo - Zukitwo is a Gnome Shell and GTK theme that currently works on Gnome Shell 3.14 and the latest version of GTK.
Octobet - Bet World cup matches with your friends on Slack!