1600 Amphitheatre Parkway Building 43 Mountain View, CA 94043 October 5, 2007 To Whom It May Concern: Cassio de Albuquerque Melo was employed by Google as a student developer during the Google Summer o f Code™ 2007 program. Cassio worked with Creative Commons on OpenO f fice.org Writer add-in for publishing CC licensed documents. Cassio did very well in the program and received a passing final evaluation from his mentor. Should you have any questions about the Google Summer o f Code program, please visit http://code.google.com/soc/. Should you have any questions regarding this letter, please contact me via email at lh@google.com. Sincerely, Leslie Hawthorn TM Program Manager – Google Summer of Code Google Inc.