Most of the GGobi code was written by Debby Swayne, Di Cook, Duncan Temple Lang and Andreas Buja. Nicholas Lewin-Koh has provided a great deal of help and wrote the primary version the time series displays. Heike Hofmann provided the primary version of the barchart displays while at AT&T and then at Iowa State. Michael Lawrence fully upgraded the GUI to GTK2. Hadley Wickham redesigned the web site, helped with many GUI design improvements and reported many bugs.