Mike Perham just released Sidekiq Pro which implements a novel licensing method similar to this. When you buy a license you get a custom git URL for your Gemfile. When the license expires your URL goes dead, you lose future upgrades, and your Gemfile is broken.
Kill Math is another take on this thought: computers can help us visualize problems better than the pencil/paper approach. The author (Bret Victor) also has one of my favorite articles on programming visualization: Ladder of Abstraction and the video Inventing on Principle
Anyone want to take a guess at what the rocket logo is in the screenshot? I wonder if they are planning on launching a deployment service of some kind.
Most of the data is just hijacked from other gems like rack-bug or pulled from Graphite and added to our bar.
I’m a big fan of Bret Victor’s talks: Inventing on Principal, Media for Thinking the Unthinkable and others