External Data was created, and is maintained, by Yaron Koren (reachable at email@example.com). The overall code base, though, is the work of many people. Alexander Mashin has contributed significantly to the code. Important code contributions have also been made by Michael Dale, David Macdonald, Siebrand Mazeland, Ryan Lane, Chris Wolcott, Jelle Scholtalbers, Kostis Anagnostopoulos, Nick Lindridge, Dan Bolser, Joel Natividad, Scott Linder, Cindy Cicalese, Umherirrender, Anysite, Sahaj Khandelwal and others.
Development of some features was funded by KeyGene and KDZ – Zentrum für Verwaltungsforschung.