BigTube - Makes watching programming tutorials more fun
Minetest - Minetest is a near-infinite-world block sandbox game and a game engine, inspired by InfiniMiner...
Amazon Chime - Online meetings and video conferencing
Roblox - Reimagining the way people come together.
CodeUpStart - Web App, Education, and Software Engineering
Terraria - Dig, Fight, Build! The very world is at your fingertips as you fight for survival, fortune, and glory.