Frozen Goodies - An advent calendar to get the chance to win daily prizes
Plan - Plan is a better way to organize.
24 Ways - An advent calendar for web geeks
Kin Calendar - The simple and connected calendar
Advent Calendar - A fun and interactive calendar
Kin - Kin is money for the digital world. It is used to generate value through a shared, decentralized cryptocurrency in a digital ecosystem of apps and their users.