GoDaven is the Worldwide Orthodox Minyan Database.
It was started in 2001 by Dr. Yosi Fishkin as a way to keep track of all the davening times at all the minyanim in the world. Over the years, with the feedback provided by thousands of minyan-goers across the globe, the depth and accuracy of the database have grown. Over 10,000 people a week now find a minyan by using the service.