Sidekiq. It's a wonderful project and has formed the basis of so many projects I have worked with over the years ever since it's inception. It's also a great example of an OSS project with a healthy commercial offering.
Yes, people who try and inject a little fun into their interactions are just the worst, aren't they? In a professional setting too. It's just shameful behaviour. Also, I'd be really cross if one of my children should stumble across this "tender lovemaker's" blog. I hope this guy is ashamed of himself.
Practical object oriented design in Ruby by Sandi Metz is hugely popular, and not just inside the Ruby community, and rightly so, it's one of if not the greatest texts on programming I've read.