Candy Crush Saga - Join Tiffi and Mr. Toffee in their sweet adventure through the wonderful Candy Kingdom. Switch and match your way through hundreds of levels in this delicious puzzle adventure.
Ring4 Meeting - Dead simple video conferencing - free, in browser
KDiamond - KDiamond is a single player puzzle game.
Stork.ai - AI-Based Collaboration for Hybrid Teams. Rich media messaging, advanced video and voice conferencing, auto-transcribing and screen sharing. Serendipitous meetings at the water-cooler with your human and AI teammates.
Gweled - Gweled is a GTK+ version of a popular game "Bejeweled", originally written by Sebastien...
openmeet - Account free video conferencing with a rooms component that lets you use VC within a physical meeting room. The server can also be hosted in your own cloud for extra privacy/security.