Docker is an open-source project to easily create lightweight, portable, self-sufficient containers from any application. The same container that a developer builds and tests on a laptop can run at scale, in production, on VMs, bare metal, OpenStack clusters, public clouds and more.
Docker is a tool in the Virtual Machine Platforms & Containers category of a tech stack.
Docker is an open source tool with 53.4K Github Stars and 15.4K Github Forks. Here’s a link to Docker's open source repository on Github
Here are some stack decisions and reviews by companies and developers who chose Docker in their tech stack.
3399 companies use Docker including Spotify, Pinterest, and Twitter.
Bitbucket, VirtualBox, Kubernetes, Ansible, and Vagrant are some of the popular tools that integrate with Docker. Here's a list of all 190 tools that integrate with Docker.