Inspired by the decision of the government of
Munich to migrate to open source software, Scott Morris has compiled
an impressive list of migrations to open source from around the world. You should take a look at his entire list (almost 100 examples) but some of the highlights, relevant to us, include the governments of Brazil, Venezuela, Mexico, Peru, Japan, Norway, Israel, China, Spain, Australia, South Korea, Indonesia, France, Austria and a bunch more.