Nitrous.IO is offering 20(.14)% off all of their paid plans to thank all of the beta users (Nitrous.IO went into public beta in June 2013)
Sign up to the free plan and then use this link to upgrade to a paid plan and receive 20% off for the whole year!
What do I think? I love Nitrous.IO - If you use any of the following languages, Nitrous.IO will exceed your expectations:
Ruby, Rails, Node.js, Python, Django, Go, PHP, HTML, CSS, Javascript, CoffeeScript, etc (many more)
P.S. Even as a free user, I've had really good results with the customer service!
My referral link for sign up:
https://www.nitrous.io/join/O71A8PHfaBE
You are supposed to say when you are posting a referral link, by rights you should be deleted, not just fixed, it is pretty clear about it