UserGuiding - User onboarding made easy, for less. Create product walkthroughs in a couple of clicks, without breaking the bank.
UXmas - An advent calendar for UX folk
Usetiful - Fight user churn with great user onboarding. Interactive product tours and smart tips significantly improve your user retention.
25DaysOf - A customizable advent calendar, for everyone
Userlane - Digital adoption platform with interactive guidance for software applications allowing anyone to understand and master any software from the get-go.
24 Ways - An advent calendar for web geeks