This post hails from the year 2010 - interesting to see how Heroku adoption has evolved since then.
With the success of Heroku, both in terms of the recent sale and the fact it’s awesome, it was always just a matter of time before other languages and frameworks got into the platform as a service game. Here’s all the one’s I know about so far, many of them in or entering beta testing at the moment. Any others I’m missing?
Update Thanks for all the comments on here and on Hacker News, I’ve updated this list with all the suggestions.