I worked at 4 other companies before Google, and Google's source code tooling was the best I'd ever seen and definitely something the rest of the world can work

I worked at 4 other companies before Google, and Google's source code tooling was the best I'd ever seen and definitely something the rest of the world can work towards. In particular, it fostered a culture where accepting code changes from outside teams was normal (though obviously not always uncontentious), and prototyping those changes was pretty easy. I've been using pantsbuild.org since I left and I think it hits a good sweet spot between blaze, which has a lot of overhead, and the rest of the world.