Years ago, working for a different employer than I do now, my team and I were tasked with rewriting a math app to utilize a new software framework. That framework had the codename Glass, and we followed that theme and gave the app itself the codename Crystal, or Crystal Math in full.
As it was far from finished, the app couldn't run by itself, so we wrote a tool to run the lines of code that were ready, and named that tool Lines.
The team was quite productive, with everyone crackin' hard and running Lines of Crystal Math all day long. Or at least we did until management found out, and insisted we'd replace the existing codenames with some less addictive names.