eDominations - multiplayer strategy game
Freerice.com - This websites donates 10 grains of rice to charity for each quiz question you answer correctly.
eRepublik - eRepublik is a Free to play, Browser-based and Massively Multiplayer Online video game created and published by eRepublik Labs.
BeanBeanBean - This website donates 3 beans to charity for each quiz question you answer correctly.
eRevollution - Multiplayer strategy game that allows users to run the economy, conquer other nations, become a politician and rule a country,or liberate your country and start a resistance war.
Agar.io Clone - A simple Agar.io clone built with socket.io and HTML5 Canvas on top of NodeJS.