Next up a JavaScript framework called Rake because who uses Ruby anymore.
Thank you for commenting :)
More importantly, who cares? It was a common 4 letter word used to describe an item that holds stuff a hell of a long time before it was a Ruby thing.
Ruby programmers are a... dedicated bunch.
http://www.indeed.com/jobtrends/q-rails-q-ruby-q-javascript-...
Seems like this is likely to reflect something other than changes in language popularity. Frankly the data doesn't seem very interesting without correcting for other factors such as total volume of jobs.
Overall, Ruby looks pretty much as popular today as 3 years ago to me from that data, though perhaps with Rails in a downwards trend (awesome - I love Ruby, but finding Ruby work that doesn't imply Rails is harder, and I don't like Rails).
But it's besides the point anyway. I simply explained why someone mentioned Rack, I don't particularly care either way (probably because I don't really care about Convox Rack - I'd never use a single vendor solution like this, and haven't exactly hidden how overpriced I find AWS in past comments).