NNDB Mapper is described as 'Create a map of connections based on famous people listed on the Notable Names Database. Learn if they have any connections from dating to political campaigns, and more' and is an website in the Development category. There are four alternatives to NNDB Mapper, not only websites but also apps for Android, iPad and iPhone. The best alternative is Famous Birthdays, which is free. Other great sites and apps similar to NNDB Mapper are FamousFix (Free, Open Source), LittleSis (Free, Open Source) and Muckerty (Free).
Famous Birthdays is a Los Angeles, California-based website dedicated to cataloging the birthdays of famous people and compiling other facts about them.It was founded in 2012 by Evan Britton, who has since described the website as "Wikipedia for Generation Z".