Rietveld is a web-based collaborative code review tool for Subversion written by Guido van Rossum to run on Google'scloud service. Van Rossum based Rietveld on the experience he had writing Mondrian. Mondrian was a proprietary application used internally by Google to review their code.
Gerrit is a fork of Rietveld started because ACL patches would not get integrated into Rietveld.
^Guido van Rossum (May 2008). "An Open Source App: Rietveld Code Review Tool". Retrieved 2012-08-24. "To stick with the naming theme, I gave this new web app the code name Rietveld, after Gerrit Rietveld, one of my favorite Dutch architects and the designer of the Zig-Zag chair. However, because most English speakers have trouble spelling his name correctly, the "live" web app is known simply as http://codereview.appspot.com."