Peter Mattis

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Peter Mattis is a computer programmer most notable for his early work on the GNU Image Manipulation Program (GIMP).

In 1995, while students at the University of California at Berkeley, Mattis and his classmate Spencer Kimball developed the first version of the GIMP as a class project. The two were also members of the Berkeley student club, the eXperimental Computing Facility (XCF).[1]

According to Mattis in 1999:

On free software and the motivations to write it and what makes good and enduring free software:[2]

Mattis works for Square, Inc. He has worked on Google Servlet Engine[3] along with Spencer Kimball.


  1. ^ Frauenheim, Ed (2000-12-04). "Free Photoshop for the people". Retrieved 2006-08-28. 
  2. ^ "Where did Spencer Kimball and Peter Mattis go?". LinuxWorld. Archived from the original on 1999-04-17. Retrieved 2007-11-17. 
  3. ^ "OpenGSE Released". Google. Retrieved 2009-01-27.