Docker things

quay.io (now acquired by CoreOS)
- 5/10/20/50/125 private repositories for $12/$25/$50/$100/$200 (it was $7/$12/$22 for 5/10/20 repositories before) per month
- unlimited public repositories
Reesd
- 10GB/25GB/50GB for €20/€45/€80 per month
- Illimited number of repositories/images/layers, only compressed layer space counts.
- Disclaimer: it is a project of mine.
- Now in beta :-)

Gone

dockervault.com
- 5/15/45 repositories for $13/$25/$70 per month (limited to 10/30/100 GB, and 1/5/15 users)
- It seems they're gone.
dockify.io (the blog http://blog.dockify.io/ is still up)
- 4/8/15 repositories for $5/$9/$16 per month
- uses S3
- seems to use the opensource Python-based docker-registry behind Gunicorn, on heroku http://blog.dockify.io/dockify/docker/docker-registry/infrastructure/2013/10/21/whats-behind-dockify.html According to this comment, they modified it http://tech.roxee.tv/2013/10/01/notes-about-fiddling-with-docker-and-continuous-deployment-ideas/#comment-14695
(stackmachine.com)
- (3/10/30 private repositories for $7/$20/$50)
- It seems they are now dedicated to game hosting...

baremetal.io
ctl-c.io (gone, or part of centylink ?)
enginedock.com (gone)
orchardup.com (closing)
- 0.5/1/2/4/8 GB for $10/$20/$40/$80/$160 per month, billed per hour (or $0.03 per GB per hour)
stackdock.com
- 1GB Memory / 20GB SSD / 1 core / $5 per month
- 4GB Memory / 60GB SSD / 2 cores / $25 per month
- 12GB Memory / 100GB SSD / 4 cores / $100 per month
tutum.co

There are various possibilities to create base images.

A possibility is to use Ubuntu Core with a simple Dockerfile:

FROM scratch
ADD ubuntu-core-13.10-core-amd64.tar.gz /

Various existing base images are already available. Reading the scripts to build them is interesting too.