[dchess]

I haven't seen anyone mention: dokku [1], but I've had good luck using dokku droplets on digital ocean for a simple Heroku alternative.

[1] https://github.com/dokku/dokku

[rcarmo]

Even simpler: https://github.com/piku/piku

[rcarmo]

Hi! Not sure why this was downvoted, since it was both on-topic and indeed simpler (I'm the creator).