I'm the author of Pingendo. Which is this "similar atom project" you mention ?
Pine in Pinegrow comes from Pine trees and no code comes from Atom. Besides Bootstrap, PG also supports Foundation, plain HTML, converting HTML pages to WordPress themes, master pages, smart components etc and aims to be a kind of modern Dreamweaver replacement.
And sorry that you feel offended by my kids having to eat.
firebug / chrome dev tools are great, I still use them along side pinegrow, but they aren't pinegrow. And pinegrow doesn't do everything perfect. I will ocassionally open up the same files I'm working in pinegrow inside a code editor for more robust tools, BUT pinegrow has been excellent to work visually on some of the mindnumbing things I'd have to do in code if I didn't have it.