Docker is fast becoming one of the hottest technologies under development. Released just a year ago, the open source project for creating virtualized application containers has already caused major cloud players, from Red Hat to Google, to rethink how applications can be delivered, run, and managed, especially in cloud environments.
For the uninitiated, Docker allows developers to take their applications and turn them into "containers" that can then be moved between systems and managed as if they were themselves VMs.
Docker is evolving rapidly, and so is its ecosystem, which includes a slew of new services that promise to help you get the most out of Docker. Here's a look at six promising entrants and the Docker services they provide.