Looking for a cheap, errr, even better FREE hosting for your Node.js apps and services? Well I guess we developers have never been so well served :-)
Node.js and a few service addons
Dedicated for Node.js, but it's been my favourite so far with super easy deploys and admin. I'll officially launch a new experimental app there soon (but if you want to take a sneak peak, there you go: http://counting.to). And if your app is open-source, they'll host it for free!
Node.js, Java, PHP, Python, .NET and dozens of service addons
AppFog was my preferred choice till a few weeks ago, when they decided to remove the custom domains from the free plan. Apart from that, they're still super cool with 2GB RAM free, and a full range of datacenters and platforms supported.
Node.js, Java, Ruby, Python and dozens of service addons
Similar to AppFog, supports a few platforms (but no specific choice of datacenter) and it's probably the most famous cloud PaaS out there. Free plan has only 1 worker but should be enough for basic apps.
Node.js, Java, Ruby, PHP, Python and basically anything on the DIY
I'm hosting my not-so-up-to-date blog there. Free plan supports 3 small gears (apps), and you have full SSH access so it's basically having your own VPS with a few limitations. OpenShift could be considered IaaS as well.
Node.js, Java, Ruby, dozens of service addons
VMWare on the cloud! Their free developer plan is somehow similar to OpenShift but I haven't tried it yet so I can't say much :-(
Although most of these services can provide MongoDB, Postgres and other databases as well, I would suggest trying a dedicated DB provider like http://mongolab.com, http://mongohq.com or http://iriscouch.com.
I'll write a more detailed review of these services soon. And if you know about any other free service worth mentioning, please feel free to leave a comment :-)